# Mathematics Grade 12 Paper 2 NSC June 2015 Memo

> Grade 12 Mathematics Paper 2 memorandum from the NSC June Exam 2015, 18 pages. Read online or get the free PDF download, question paper linked when available.

- Page: https://www.hlayiso.com/library/mathematics-p2-june-july-2015-memo-afr-eng/968fecc6-85d3-4ec6-b5b3-a0434aac7fe0
- Updated: 2026-09-27
- Subject: Mathematics
- Grade: Grade 12
- Document type: Memorandum
- Year: 2015
- Exam period: NSC June Exam
- Paper: 2
- Curriculum: CAPS
- Pages: 18

Breadcrumbs: [Home](https://www.hlayiso.com/) › [Library](https://www.hlayiso.com/library) › [Grade 12](https://www.hlayiso.com/library/grade-12) › [Mathematics](https://www.hlayiso.com/library/grade-12/mathematics) › [Mathematics Grade 12 Paper 2 NSC June 2015 Memo](https://www.hlayiso.com/library/mathematics-p2-june-july-2015-memo-afr-eng/968fecc6-85d3-4ec6-b5b3-a0434aac7fe0)

## About this document

Mathematics · Grade 12 · NSC June Exam · 2015. Memorandum, 18 pages. Read online or download the PDF.

Read it free online on the page above; download the PDF from there.

## Document text

Text extracted from the PDF. Layout, diagrams and tables may not survive extraction.

### Page 1

Downloaded from hlayiso.com

                   SENIOR CERTIFICATE EXAMINATION/
                      SENIORSERTIFIKAAT-EKSAMEN

                               MATHEMATICS P2/WISKUNDE V2

                                                2015

                                        MEMORANDUM

                                                                          MARKS/PUNTE: 150

                             This memorandum consists of 18 pages./
                            Hierdie memorandum bestaan uit 18 bladsye.

Copyright reserved/Kopiereg voorbehou                              Please turn over/Blaai om asseblief

### Page 2

Downloaded from hlayiso.com
Mathematics/P2/Wiskunde V2                               2                                                   DBE/2015
                                                NSCNSS – Memorandum

NOTE:
• If a candidate answers a question TWICE, only mark the FIRST attempt.
• Consistent accuracy applies in ALL aspects of the marking memorandum.

LET WEL:
• As 'n kandidaat 'n vraag TWEE KEER beantwoord, sien slegs die EERSTE poging na.
• Volgehoue akkuraatheid word in ALLE aspekte van die memorandum toegepas.

QUESTION/VRAAG 1

                3        4   4    5     23      29   32    36   40    47        56    66      68       76   82

1.1.1                               571                                                              571
          Mean/gemiddelde =                                                                        
                                     15                                                              15
                                  = 38,07 years/jaar                                                answer/antw
                                                                                                                    (2)
1.1.2     Median/mediaan = 36 years/jaar                                                            answer/antw
                                                                                                                    (1)
1.1.3     IQR/IKV = 66 – 5                                                                          Q 3 = 66
                  = 61 years/jaar                                                                   Q1= 5
                                                                                                    answer/antw
                                                                                                                    (3)
1.1.4     Standard deviation/standaardafwyking
          = 26,388… = 26,39 years/jaar                                                              answer/antw
                                                                                                                 (2)
1.2
                                                                                                    max & min
                                                                                                    median/
                                                                                                     mediaan
          3 5                              36                                            82
                                                                     66
                                                                           70                       quartiles/
                    10       20       30        40        50    60                      80
                                                                                                     kwartiele

                                                                                                                    (3)
1.3       The data is skewed to the right/Die data is skeef na regs

          OR/OF

          positively skewed/positief skeef                                                          answer/antw
                                                                                                                    (1)
                                                                                                                   [12]

Copyright reserved/Kopiereg voorbehou                                                Please turn over/Blaai om asseblief

### Page 3

Downloaded from hlayiso.com
Mathematics/P2/Wiskunde V2                       3                                            DBE/2015
                                        NSCNSS – Memorandum

QUESTION/VRAAG 2

 Number of Saturdays attended 12 11 10 10 9 9 7 6 5 4 12 11 6
 Mark (as a %)                96 91 78 83 75 62 70 68 56 34 88 90 59

2.1       a = 22,26252159…                                                         22,26
          b = 5,898100173...                                                       5,90
          ∴ ŷ = 5,90x + 22,26                                                     equation/vgl
                                                                                                   (3)
2.2       r = 0,92 (0,9205276443...)                                                answer/antw
                                                                                                   (2)
2.3       There is a very strong relationship between the variables/                very strong/
          Daar is 'n baie sterk verband tussen die veranderlikes.                    baie sterk
                                                                                                   (1)
2.4       ∴ ŷ ≈ 69,447 = 69,45 ≈ 69% (accept 70%)                                  answer/antw
                                        OR/OF                                                      (2)
          ∴ ŷ ≈ 5,90(8) + 22,26                                                    substitution/
                                                                                     substitusie
               ≈ 69,46 %
                                                                                    answer/antw
               ≈ 69%       (accept 70%)                                                            (2)
                                                                                                   [8]

Copyright reserved/Kopiereg voorbehou                                  Please turn over/Blaai om asseblief

### Page 4

Downloaded from hlayiso.com
Mathematics/P2/Wiskunde V2                       4                                            DBE/2015
                                        NSCNSS – Memorandum

QUESTION/VRAAG 3

                                                 y

                                   Q

                                                M(0 ; 4)
                  P

                                                                              R(4 ; 2)
                                                N

                                                        S(2 ; 1)

                                                                         1    2                              x
                                                O                            T

3.1              2 −1
          mRS =                                                                    correct subst/
                 4−2
                 1                                                                  korrekte subst
               =                                                                   answer/antw
                 2                                                                                    (2)
3.2                  1
          PQ is y =    x+6
                     2
                                   1
          ∴PQ | | RS  mPQ = mRS =                                               S
                                   2
          But/maar PS | | QR
          ∴PQRS = parallelogram        (opp sides of quad are | | / teenoorst     S/R
                                                                    sye v vh | |)
          ∴PQ2 = RS2 = (4 – 2)2 + (2 – 1)2                                         subst of/subst v
               = 2 2 + 12                                                           R(4 ; 2) and/en
                                                                                    S(2 ; 1)
          ∴PQ = RS = 5 = 2,24 (opp sides of ||m /teenoorst sye v ||m)             answer/antw
                                                                                                   (4)

Copyright reserved/Kopiereg voorbehou                                  Please turn over/Blaai om asseblief

### Page 5

Downloaded from hlayiso.com
Mathematics/P2/Wiskunde V2                       5                                     DBE/2015
                                        NSCNSS – Memorandum

3.3              4−2
          mQR =
                 0−4
                   1
                =−                                                         m QR
                   2
                             1                                             m PT
          mPT = mQR = −         (PS | | QR)
                             2
          Equation of/Vgl van PT:
                     1                                 1
          y − y1 = − ( x − x1 )                 y= −     x+c
                     2                                 2
                     1                               1
            y − 1 = − ( x − 2)                  1 = – (2) + c              subst of/subst v
                     2             OR/OF
                                                     2                      m and/en S(2 ; 1)
                     1
            y −1 = − x +1                       2= c
                     2
                     1                                 1
               y =− x+2                         y= −     x+2
                     2                                 2                    equation/vgl
                                                                                               (4)
3.4       N(0 ; 2)                                                         coordinates
                                                                                               (1)
3.5                           1
           tan T2 = mPT = −                                                               1
                              2                                             tan T2 = −
                                                                                          2
             T2 = 153,4°
          Equation of/Vgl van NR: y = 2                                     T2 = 153,4°
                                                                           y = 2
          ∴ RN̂S = NT̂O (alt ∠s; NR || OT)
                                                                           S
          RN̂S = NT̂O = 180° – 153,4°
                                                                            RN̂S = 26,6°
                       = 26,6°
                                                                                               (5)
                                                                                              [16]

Copyright reserved/Kopiereg voorbehou                           Please turn over/Blaai om asseblief

### Page 6

Downloaded from hlayiso.com
Mathematics/P2/Wiskunde V2                          6                                           DBE/2015
                                           NSCNSS – Memorandum

QUESTION/VRAAG 4

                                                    y

                                   A

                                                                   C                        x
                                                O
                                                                        D

                                                            B(3 ; –4)

                                1 
                       E− 3; − 8 
                                2 

4.1       A(–3 ; 4)                                                                   x = –3
                                                                                      y = 4
                                                                                                              (2)
           2       2       2           2    2           2
4.2       r = (3) + (–4)       OR r = (–3) + (4)                                       substitution/
                                                                                        substitusie
          r2 = 25                                                                     r2 = 25
          ∴Equation of the circle through A, B and C/ Vgl vd sirkel deur A, B
            en C: x2 + y2 = 25                                                        answer/antw
                                                                                                              (3)
4.3       r=5                                                                         r = 5
          ∴ AB = 10 units/eenhede                                                      answer/antw
                                                                                                              (2)
4.4       AB ⊥ ED OR AB̂D = 90° (radius ⊥ tangent/raaklyn)                            S/R
          BD 2 = AD 2 − AB 2  (Theorem of Pythagoras/st v Pythagoras)
           BD 2 = ( 125 ) 2 − (10) 2                                                   subst into/in
               2
           BD = 25                                                                      Pyth th/stelling
           BD = 5 units/eenhede                                                        answer/antw
                                                                                                              (3)
4.5                                      1
          area of/oppervlakte van ∆ABD = base/basis × ⊥ height/hoogte
                                         2                                             formula/formule
                                         1                                             substitution/
                                       = (5)(10)                                        substitusie
                                         2
                                       = 25 square units/vk eenhede                    answer/antw
                                                                                                      (3)
Copyright reserved/Kopiereg voorbehou                                   Please turn over/Blaai om asseblief

### Page 7

Downloaded from hlayiso.com
Mathematics/P2/Wiskunde V2                       7                                           DBE/2015
                                        NSCNSS – Memorandum

4.6       AE is a diameter/middellyn      (line subtending a right angle/            S/R
                                           lyn onderspan ‘n regte hoek)
          AE= 4 – (–8,5) = 12,5 units/eenhede                                        AE = 12,5
                  1          25                                                           1      25
          ∴r = 6 or/of                                                              r = 6 or/of
                  4           4                                                           4      4
          Centre of new circle/middelpunt v nuwe sirkel:
                  4 + −8,5
          = (−3 ;          )                                                        x = –3
                      2
                      1            9                                                           1
          = (−3 ; − 2 ) or (−3 ; − ) or (−3 ; − 2,25)                               y = − 2
                      4            4                                                           4
          ∴Equation of new circle/Vgl v nuwe sirkel:
                             9    625
            (x + 3)2 + (y + )2 =       = 39,06                                       equation/vgl
                             4    16                                                                    (6)
                                                                                                       [19]

Copyright reserved/Kopiereg voorbehou                                 Please turn over/Blaai om asseblief

### Page 8

Downloaded from hlayiso.com
Mathematics/P2/Wiskunde V2                               8                                           DBE/2015
                                                NSCNSS – Memorandum

QUESTION/VRAAG 5

5.1                       1                                                              sketch/skets:
          cos β = −               and/en 180° < β < 360°
                          5                                                               correct quad/
                                                                                            korrekte kwadr
                                                                                          x = –1
          (−1) 2 + y 2 = ( 5 ) 2                                          β              subst into Pyth/
                      2
                1+ y = 5                                                                   subst in Pyth
                     y2 = 4                                               5
                      y = −2                                                              value of/waarde
                                                                                           van y
                                                                (–1 ;y)
                              2
          ∴sin β = −                                                                      value of/waarde
                              5
                                                                                            van sin β
                                                                                                         (5)
5.2        (− tan x).(− sin(90° − x)                                                     – tan x
                    4 sin x                                                               –sin(90° – x)
           (− tan x).(− cos x)                                                            sin x
                                                                                         – cos x
                 4 sin x
                sin x
             (−        ).(− cos x)                                                           sin x
                cos  x                                                                   
          =                                                                                  cos x
                    4 sin x
             1                                                                            answer/antw
          =
             4                                                                                               (6)
5.3.1               sin A      p                                                          answer/antw
          tan A =           =                                                                                (1)
                    cos A q
5.3.2      p 4 − q 4 = ( p 2 + q 2 )( p 2 − q 2 )                                         factors/faktore
                     = (sin 2 A + cos 2 A)(sin 2 A − cos 2 A)
                     = (1)(sin 2 A − cos 2 A)                                            identity/identiteit
                     = −1(cos 2 A − sin 2 A)                                              –1 as CF/GF
                     = −cos2A                                                             answer/antw
                                                                                                          (4)
5.4.1                                                                                     writing as single
                   cos 2 θ − cos 2θ
          LHS/LK =                                                                         term/skryf as
                      sin θ . cos θ                                                        enkelterm
                   cos 2 θ − (cos 2 θ − sin 2 θ )                                         expansion/
                 =                                                                         uitbreiding
                             sin θ . cos θ
                   cos 2 θ − cos 2 θ + sin 2 θ                                            simplify/vereenv
                 =
                            sin θ . cos θ
                     sin 2 θ                                                              simplify/vereenv
                 =
                   sin θ . cos θ
                   sin θ                                                                  simplify/vereenv
                 =         = tan θ = RHS/RK
                   cos θ                                                                                 (5)
          OR

Copyright reserved/Kopiereg voorbehou                                         Please turn over/Blaai om asseblief

### Page 9

Downloaded from hlayiso.com
Mathematics/P2/Wiskunde V2                            9                                   DBE/2015
                                             NSCNSS – Memorandum

                      cos 2 θ − cos 2θ                                         writing as single
          LHS/LK =                                                              term/skryf as
                        sin θ . cos θ
                                                                                enkelterm
                      cos 2 θ − ( 2 cos 2 θ − 1 )                              expansion/
                   =
                              sin θ . cos θ                                     uitbreiding
                      1 − cos 2 θ
                   =                                                           simplify/vereenv
                      sin θ . cos θ
                        sin 2 θ
                   =
                      sin θ . cos θ                                            identity/identiteit
                      sin θ
                   =
                      cos θ                                                    simplify/vereenv
                   = tan θ = RHS/RK                                                           (5)
5.4.2     Undefined when/Ongedefinieerd as:
          cos θ = 0, sin θ = 0
          ∴ θ = 90°                                                            answer/antw
                                                                                                  (2)
5.5       2(2sin x. cos x) + 3 sin x = 0                                       expansion/
          4sin x. cos x + 3 sin x = 0                                           uitbreiding
          sin x (4cos x + 3) = 0                                               factorise/
                                             3                                  faktoriseer
          sin x = 0      or/of   cos x = –                                     both equations/
                                             4
                                                                                beide vgls
          x = 0° + k.360° or 180° + k.360°; k∈Z                                x = 0° + k.360°
          OR/OF                                                                 or 180° + k.360°
          x = k.180° ; k∈Z                                                        OR/OF
                                                                                x = k.180°
          or/of
          x = 138,59° + k.360° or/of 221,41° + k.360° ; k∈Z                   138,59+ k.360° or
          OR/OF                                                                221,41°+ k.360
          x = ±138,59° + k.360° ; k∈Z                                             OR/OF
                                                                               ±138,59°+ k.360
                                                                               k∈Z
                                                                                             (6)
                                                                                            [29]

Copyright reserved/Kopiereg voorbehou                              Please turn over/Blaai om asseblief

### Page 10

Downloaded from hlayiso.com
Mathematics/P2/Wiskunde V2                           10                                       DBE/2015
                                            NSCNSS – Memorandum

QUESTION/VRAAG 6

                                                  1
                                                                   f

             -90 °        -60 °         -30 °         0°    30 °       60 °         90°

                                                                   g

                                                 –1

6.1       Period of/Periode van f = 120°                                       120°
                                                                                                      (1)
6.2       b= 3                                                                b = 3
                                                                                                      (1)
6.3       x = –45° or/of x = –22,5° or/of x = 67,5°                           x = –45°
                                                                              x = –22,5°
                                                                              x = 67,5°
                                                                                                      (3)
6.4       x ∈ (–45° ; –22,5°) ∪ (67,5° ; 90°]                                  critical values
                                                                               notation
                                                                               critical values
                                                                               notation
          OR/OF                                                                                       (4)

          − 45° < x < −22,5° or/of 67,5° < x ≤ 90°                             kritieke waardes
                                                                               notasie
                                                                               kritieke waardes
                                                                               notasie
                                                                                                      (4)
                                                                                                      [9]

Copyright reserved/Kopiereg voorbehou                                  Please turn over/Blaai om asseblief

### Page 11

Downloaded from hlayiso.com
Mathematics/P2/Wiskunde V2                             11                                   DBE/2015
                                              NSCNSS – Memorandum

QUESTION/VRAAG 7

                                                                    3x
                                          x               R          2                            S
                        P

                                  3x
              x

      Q

7.1          QR 2 = PQ 2 + RP 2 − 2.PQ.RP.cos P̂
                                                                               correct subst into
          ( 3 x) 2 = x 2 + x 2 − 2.x.x.cos P̂                                   cosine rule/korrek
                   x 2 + x 2 − ( 3 x) 2                                         subst in cos-reël
          cos P̂ =
                           2 x.x                                               cos P̂ as subj/
                   −x   2                                                                 onderw
          cos P̂ =
                    2x 2
                     1
          cos P̂ = −                                                          simplify/vereenv
                     2
          P̂ = 120°                                                            answer/antw
                                                                                                      (4)
7.2       PR̂Q = PQ̂R = 30° (∠s opp equal sides/∠e teenoor gelyke sye)        S
          QR̂S = 150°        (∠s on a str line/∠e op reguitlyn)               S
                                   1
          Area of/Opp van ∆ QRS = (QR)(RS)(sin QR̂S)
                                   2
                                   1          3                                correct subst into
                                 = ( 3 x)( x)(sin 150°)
                                   2          2                                 area rule/korrek
                                    3 3 2 1                                     subst in opp-reël
                                 =(       x )( )                              simplify/vereenv
                                      4        2
                                   3 3 2             2
                                 =       x = 0,65 x                            answer/antw
                                     8

                                                                                                      (5)
                                                                                                      [9]

Copyright reserved/Kopiereg voorbehou                                Please turn over/Blaai om asseblief

### Page 12

Downloaded from hlayiso.com
Mathematics/P2/Wiskunde V2                         12                                               DBE/2015
                                          NSCNSS – Memorandum

QUESTION/VRAAG 8

                                                             A
                                                         1 2

                  1                              T     65°       2       P
        C        25°                             3 2                 1

                                         1
                                             2
                                         B

                                                                                            D

8.1.1       P̂2 = 65°              (∠s opp equal sides/∠e teenoor gelyke sye)          S  R
                                                                                                            (2)
8.1.2       D̂ = 40°               (ext∠ of ∆CDP/buite∠ v ∆CDP )                        S R
                                          OR/OF
                                   (∠s on a str line; sum of ∠s in ∆/
                                     ∠e op regt lyn; som v ∠e in ∆)                                         (2)
8.1.3       Â 1 = 40°             (ext∠ of ∆CAT/buite∠ v ∆ CAT )                      S  R
                                          OR/OF
                                   (∠s on a str line; sum of ∠s in ∆/                                       (2)
                                     ∠e op regt lyn; som v ∠e in ∆)
8.2         Â 1 = D̂ = 40°                                                            S
            ∴CA is a tangent to the circle (∠ between line and chord)/                 R
               CA is 'n raaklyn aan die sirkel (∠ tussen lyn en koord)                                      (2)
                                                                                                            [8]

Copyright reserved/Kopiereg voorbehou                                        Please turn over/Blaai om asseblief

### Page 13

Downloaded from hlayiso.com
Mathematics/P2/Wiskunde V2                          13                                       DBE/2015
                                           NSCNSS – Memorandum

QUESTION/VRAAG 9

               D                                 E                                       A
                       2                     2        1
                   1

                                       1
                                   O
                                                  2       3
                                                 1
                                                          B

                               x
                           C

9.1.1     ext∠ of cyclic quad/buite ∠ van koordevh                              R
                                                                                                     (1)
9.1.2     ∠ at centre = 2 ×∠ at circumference / midpts∠ = 2 × omtreks∠          R
                                                                                                     (1)
                 
9.2.1     CD̂A = E1 = x        (corresp∠s/ooreenk ∠e; EB || DC)                  S R
          ∴ CD̂A = Ĉ = x
          ∴ AC = AD       (sides opp equal ∠s/sye teenoor gelyke ∠e)             S (justification)
                                                                                                  (4)
9.2.2     Â = 180° − 2 x (sum of ∠s in ∆/som van ∠e in ∆)                      S
          Ô1 = 2 x OR Â + Ô1 = 180° − 2 x + 2 x = 180°                        linking the 2 ∠s
          ∴ ABOD is a cyclic quad/koordevh (opp∠s quad supp/                    R
                                                  teenoorst ∠e van vh suppl)                         (3)
                                                                                                     [9]

Copyright reserved/Kopiereg voorbehou                                 Please turn over/Blaai om asseblief

### Page 14

Downloaded from hlayiso.com
Mathematics/P2/Wiskunde V2                           14                                           DBE/2015
                                            NSCNSS – Memorandum

QUESTION/VRAAG 10

10.1         then the line is parallel to the third side/is die lyn ewewydig aan     S
             die derde sy.                                                                                (1)

                                                           B

                                        F

                           D

                                                                                                    C
         A                           12                           E              8

10.2.1       AE 12 3                                                                 S
                =      =
             AC 20 5
             AD 3
                =
             AF 5
               AE AD
             ∴     =                                                                 S
               AC AF
             ∴ DE || FC           (line divides two sides of ∆ in prop/              R
                                   lyn verdeel twee sye v ∆ in dieselfde verh)                            (3)
10.2.2       BF     8
                 =           (prop theorem/eweredigh st; BC || FE)                    S/R
             BA 20
                     8
             ∴ BF =    (14)                                                           substitute 14/
                    20                                                                 stel 14 in
                    28                3
             ∴ BF =     OR/OF FB = 5 OR/OF FB = 5,6                                   answer/antw
                     5                5
                                                                                                          (3)
                                                                                                          [7]

Copyright reserved/Kopiereg voorbehou                                      Please turn over/Blaai om asseblief

### Page 15

Downloaded from hlayiso.com
Mathematics/P2/Wiskunde V2                       15                                              DBE/2015
                                        NSCNSS – Memorandum

QUESTION/VRAAG 11

 11.1          Draw diameter AD and join DC.                                  construction/
               Trek middellyn AD en verbind DC.                                konstruksie
                                                D
                               C

                                                       B

                                           O

                                    A
                                                           P
               Proof/Bewys:
               BÂP + BÂD = 90°    (tangent/raaklyn ⊥ radius)                S R
               DĈB + AĈB = 90°    (∠ in semi circle/halfsirkel)             S R
               but
               BÂD = DĈB         (∠s in same segment/∠e in dies segm)       S/R
               ∴ BÂP = AĈB                                                                        (6)

               OR/OF
                                                                              construction/
               Draw diameter AD and join DB.                                   konstruksie
               Trek middellyn AD en verbind DB.

                                                D
                               C

                                                       B

                                            O

                                    A
                                                           P

               Proof/Bewys:
                                                                              S R
               PÂB + BÂD = 90°    (tangent/raaklyn ⊥ radius)
                                                                              S R
               DB̂A = 90°           (∠ in semi circle/halfsirkel)
               BÂD + AD̂B = 90°   (sum of ∠s in ∆/som van ∠e in ∆)
               AD̂B = AĈB         (∠s in same segment/∠e in dies segm)       S/R
               ∴ BÂP = AĈB
                                                                                                    (6)

Copyright reserved                                                  Please turn over/Blaai om asseblief

### Page 16

Downloaded from hlayiso.com
Mathematics/P2/Wiskunde V2                       16                                      DBE/2015
                                        NSCNSS – Memorandum

              OR/OF
              Draw radii OA and OB.                                        construction/
              Trek radii OA en OB.                                          konstruksie

                                   C

                                                       B

                                            O

                                        A
                                                           P

              Proof/Bewys:
              OÂB + BÂP = 90° (tangent/raaklyn ⊥ radius)
              ∴ BÂP = 90° − OÂB                                          S R
              OÂB = OB̂A         (∠s opp equal sides/∠e to gelyke sye)    S
              AÔB = 180° − 2OÂB (sum of ∠s in ∆/som van ∠e in ∆)         S/R
              ∴ AĈB = 90° − OÂB (∠ at centre = 2 ×∠ at circumference/    S
                                    midpts∠ = 2 × omtreks∠)
              ∴ BÂP = AĈB
                                                                                                  (6)

Copyright reserved/Kopiereg voorbehou                             Please turn over/Blaai om asseblief

### Page 17

Downloaded from hlayiso.com
Mathematics/P2/Wiskunde V2                           17                                            DBE/2015
                                            NSCNSS – Memorandum

            B                   D
                                1
                                        2               1
                                                              C
                                                         2

                                1
                                    2
                               E

                                            1
                                                2
                                                A
                                                                      P

 11.2.1         DĈA = 2 x    (EC bisector)
                P̂ = x        (∠ at centre = 2 ×∠ at circumference/            SR
                                         midpts∠ = 2 × omtreks∠)
                Â 1 = P̂ = x (tangent-chord theorem/rkl-kd st)                SR
                In ∆BAD and ∆BCE:
                B̂ = B̂       (common/gemeen)                                  S
                Â1 = Ĉ1     (proven above)                                    S(with justification)
                ∴∆BAD | | | ∆BCE (∠∠∠)                                         R
                                                                                                   (7)
                                          OR/OF
                DĈA = 2 x    (EC bisector)
                P̂ = x        (∠ at centre = 2 ×∠ at circumference/            SR
                                         midpts∠ = 2 × omtreks∠)
                Â 1 = P̂ = x (tangent-chord theorem/rkl-kd st)                SR
                In ∆BAD and ∆BCE:
                B̂ = B̂       (common/gemeen)                                  S
                Â1 = Ĉ1     (proven above)                                    S(with justification)
                D̂1 = Ê 1                                                     S
                ∴∆BAD | | | ∆BCE
                                                                                                      (7)

Copyright reserved                                                    Please turn over/Blaai om asseblief

### Page 18

Downloaded from hlayiso.com
Mathematics/P2/Wiskunde V2                      18                                   DBE/2015
                                       NSCNSS – Memorandum

 11.2.2(a)     BÂC = 90°          (tangent/raakl ⊥ radius)        R
               ∴BC2 = 82+ 62 = 100 (Pythagoras theorem/stelling)    substitution into
                 BC = 10                                             Pyth theorem
                 AC = DC = 6       (radii)                          BC = 10
               ∴ BD = 10 – 6 = 4 units/eenhede                      DC = 6
                                                                    BD = 4
                                                                                           (5)
 11.2.2(b)     BA BD                                               S
                    =              (∆BAD | | | ∆BCE)
               BC BE
                  8   4                                             substitution/
               ∴ =
                 10 BE                                               substitusie
               ∴ BE = 5 units/eenhede                               BE = 5
                                                                                           (3)
 11.2.2(c)     AE = 3
               In ∆ACE:
                       3                                            correct trig ratio/
               tan x =                                               korrekte trigvh
                       6
                                                                    correct trig eq/
               ∴x = 26,57°                                           korrekte trigvgl
                                                                    answer/antw
               OR/OF                                                                       (3)

                         8                                          correct trig ratio/
               sin 2x =                                              korrekte trigvh
                        10                                          correct trig eq/
                                                                     korrekte trigvgl
               ∴ 2x = 53,1301...    (2x < 90°)                      answer/antw
               ∴ x = 26,57°                                                             (3)
                                                                                       [24]

                                                                   TOTAL/TOTAAL:                 150

Copyright reserved

## Related documents

- [Mathematics P2 June July 2015 Eng](https://www.hlayiso.com/library/mathematics-p2-june-july-2015-eng/f0dc57ae-b1ff-4f0d-8e51-76a1a169619f) — Mathematics · QP · 2015 · Eng
- [MATHS P2 GR12 QP AFR SEPT2015](https://www.hlayiso.com/library/maths-p2-gr12-qp-afr-sept2015/3740a254-a75d-4fd7-8875-08e16e21a026) — Mathematics · QP · 2015 · Afr
- [2015 GRADE 12 MATH TRIAL EXAM PAPER 2 KZN](https://www.hlayiso.com/library/2015-grade-12-math-trial-exam-paper-2-kzn/4aa2eb25-577f-4180-861e-a176411663c1) — Mathematics · QP · 2015
- [Mathematics P2 Feb March 2015 Eng](https://www.hlayiso.com/library/mathematics-p2-feb-march-2015-eng/bbf0bced-85a3-4ad4-bb68-72371428eb70) — Mathematics · QP · 2015 · Eng
- [Mathematics P2 Feb March 2015 Afr](https://www.hlayiso.com/library/mathematics-p2-feb-march-2015-afr/f52dfa4b-dbf2-49fd-b128-54cc089cde28) — Mathematics · QP · 2015 · Afr
- [Mathematics P2 May June 2018 Eng](https://www.hlayiso.com/library/mathematics-p2-may-june-2018-eng/4f3d38e9-a707-40ca-beee-fea324344ead) — Mathematics · QP · 2018 · Eng

## More from Grade 12 Mathematics

- [MATHS P1 ANSWER BOOK GR12 SEPT 2025 English Afrikaans watermark](https://www.hlayiso.com/library/maths-p1-answer-book-gr12-sept-2025-english-afrikaans-watermark/d78c3fd3-dcd5-4f3f-911b-e5635b4686cc) — Addendum · 2025 · Afr
- [Maths Grade 12 NSC P2 QP September 2025 Gauteng](https://www.hlayiso.com/library/maths-grade-12-nsc-p2-qp-september-2025-gauteng/1d6bf7fd-d288-4a01-99f7-2c87e247760c) — QP · 2025
- [Maths Grade 12 NSC P2 QP September 2025 Afr Limpopo](https://www.hlayiso.com/library/maths-grade-12-nsc-p2-qp-september-2025-afr-limpopo/f2f8d481-5d87-4e89-bb21-6077bbcf403d) — QP · 2025 · Afr
- [Maths Grade 12 NSC P1 QP September 2025 Afr Northern Cape](https://www.hlayiso.com/library/maths-grade-12-nsc-p1-qp-september-2025-afr-northern-cape/f5b3a4ce-fa91-4475-96e0-0654a87e1405) — QP · 2025 · Afr
- [Maths Grade 12 NSC P2 QP September 2025 Eng Northern Cape](https://www.hlayiso.com/library/maths-grade-12-nsc-p2-qp-september-2025-eng-northern-cape/4ede8207-ca82-4419-bae1-fae734498cc7) — QP · 2025 · Eng
- [MATHS P2 ANSWER BOOK GR12 JUNE 2024 Afr+English](https://www.hlayiso.com/library/maths-p2-answer-book-gr12-june-2024-afr-english/4a71e975-4ac4-4f55-8e23-0b8155a5b0c6) — Addendum · 2024 · Eng

## Collection

- [Grade 12 past papers](https://www.hlayiso.com/grade-12/past-papers)

---

Hlayiso: free CAPS and IEB past papers, memos, notes and study guides for South African learners. When citing, link the page URL above, not a PDF or /api/ URL.
