# Technical Mathematics Grade 11 P2 2023 Memo (Eng)

> Grade 11 Technical Mathematics Paper 2 memorandum from the Eastern Cape November Exam 2023 (English), 15 pages. Read online or download the free PDF.

- Page: https://www.hlayiso.com/library/tech-math-p2-gr11-memo-nov2023-afr-english/3e3febcf-e62a-462a-8337-10f46fe74e81
- Updated: 2026-09-27
- Subject: Technical Mathematics
- Grade: Grade 11
- Language: English
- Document type: Memorandum
- Year: 2023
- Exam period: Eastern Cape November Exam
- Paper: 2
- Curriculum: CAPS
- Pages: 15

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## About this document

Technical Mathematics · Grade 11 · Eastern Cape November Exam · 2023 · English. Memorandum, 15 pages. Read online or download the PDF.

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## Matching paper and memo

- [TECH MATH P2 QP GR11 NOV 2023 English](https://www.hlayiso.com/library/tech-math-p2-qp-gr11-nov-2023-english/b27cd84e-7df6-472c-8350-962eccaacbe9) — QP · 2023 · Eng

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                        NATIONAL SENIOR
                     CERTIFICATE/NASIONALE
                       SENIORSERTIFIKAAT

                        GRADE/GRAAD 12

                         NOVEMBER 2023

TECHNICAL MATHEMATICS P2/TEGNIESE WISKUNDE V2
       MARKING GUIDELINE/NASIENRIGLYN

MARKS/PUNTE:   150

                     This marking guideline consists of 16 pages./
                     Hierdie nasienriglyn bestaan uit 16 bladsye.

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2          TECHNICAL MATHEMATICS P2/TEGNIESE WISKUNDE V2                            (EC/NOVEMBER 2023)

NOTE:
• Continuous accuracy (CA) applies only where indicated in this marking guideline.
• Assuming values/answers in order to solve a problem is unacceptable.

LET WEL:
• Volgehoue akkuraatheid (CA) is slegs van toepassing soos aangedui in hierdie nasienriglyn.
• Aanvaarding van waardes/antwoorde om ŉ probleem op te los, is onaanvaarbaar.

                             MARKING CODES / NASIENKODES
M          Method / Metode
A          Accuracy / Akkuraatheid
AO         Answer only / Slegs antwoord
CA         Consistent accuracy / Deurlopende akkuraatheid
F          Formula / Formule
I          Identity / Identiteit
R          Rounding / Afronding
S          Simplification / Vereenvoudiging
ST         Statement / Bewering
RE         Reason / Rede
ST RE      Statement and correct reason / Bewering en korrekte rede
SF         Substitution correctly in correct formula / Korrekte vervanging in die korrekte
           formule
NPU        No penalty for omitting units / Geen penalisering vir eenhede uitgelaat

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(EC/NOVEMBER 2023)     TECHNICAL MATHEMATICS P2/TEGNIESE WISKUNDE V2                   3

QUESTION/VRAAG 1

1.1    product / produk                                             ✓                   A
                                                                                                 (1)
1.2          𝑦2 − 𝑦1                                                ✓F                      A
       𝑚𝑃𝑄 =
             𝑥2 − 𝑥1                                                ✓ SF                    A
                      6−2
       𝑚𝑃𝑄 = 2−(−1)

                  4                                                 ✓ Ans. / Antw.      CA
       𝑚𝑃𝑄 = 3                                                                                   (3)
1.3    𝑚𝑃𝑄 × 𝑚𝑃𝑅 = −1                                               ✓M                          A
       4        6−𝑘                                                 ✓ SF                        A
           × 2 − 6 = −1
       3
       4        6−𝑘
         × −4 = −1                                                  ✓ Simpl. / Vereenv.         CA
       3
       6−𝑘
                = −1
           −3

       6−𝑘 =3
       −𝑘 = −3
       𝑘=3                                                                                       (3)
1.4    𝑀𝑄𝑅 (
                 𝑥2 + 𝑥1 𝑦2 + 𝑦1
                            ;           )                           ✓F                          A
                   2        2
                 −1 + 6 2 + 3
                                                                    ✓ SF                        A
       𝑀𝑄𝑅 (            ;           )
                   2            2
                 5 5
       𝑀𝑄𝑅 (2 ; 2)                                                  ✓ Ans. / Antw.CA
                                                                                                 (3)

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4          TECHNICAL MATHEMATICS P2/TEGNIESE WISKUNDE V2                                           (EC/NOVEMBER 2023)

 1.5      𝑀𝑄𝑅 = 𝑀𝑃𝑆
            5 5         2 + 𝑥𝑆 6 + 𝑦 𝑆
          ( ; )=(               ;        )
            2 2        2            2
             5  2 + 𝑥𝑆                           5    6+𝑦
          ∴2= 2                 and/en ∴ 2 = 2 𝑆                                            ✓2=
                                                                                               5      2 + 𝑥𝑆
                                                                                                                    CA
                                                                                                        2
          5 = 2 + 𝑥𝑆                  5 = 6 + 𝑦𝑆                                               5      6 + 𝑦𝑆
                                                                                            ✓2= 2             CA
          3 = 𝑥𝑆                      −1 = 𝑦𝑆
          ∴ 𝑆(3 ; −1)                                                                       ✓ value of/waarde van
                                                                                              x
                                                                                                              CA
                                                                                            ✓ value of/waarde van
                                                                                              y
                                                                                                              CA

                                                     OR/OF
          𝑃 → 𝑅 = 𝑃(2 ; 6) → 𝑅(6 ; 3)
          ∴ 𝑃 → 𝑅 = (𝑥 + 4 ; 𝑦 − 3)                                                         ✓M                  A
          ∴ 𝑄 → 𝑆 = 𝑄(−1 ; 2) → 𝑆(−1 + 4 ; 2 − 3)                                           ✓S                CA
          ∴ 𝑆(3 ; −1)                                                                       ✓ value of/waarde van
                                                                                              x
                                                                                                              CA
                                                                                            ✓ value of/waarde van
                                                                                               y
                                                                                                              CA
                                                                                                               (4)
 1.6      𝑚𝑃𝑅 = − 𝟒
                     𝟑
                                                             𝑚𝑃𝑅 = − 𝟒
                                                                      𝟑                     ✓ Gradient/gradient
                    𝟑                                                      𝟑                                  CA
          ∴ 𝑦 = −𝟒𝑥 + 𝑐                                      ∴ 𝑦 − 𝑦1 = − 𝟒 (𝑥 − 𝑥1 )
                            𝟑                                                      𝟑
          (2 ; 6): 6 = − (2) + 𝑐                             (2; 6): 𝑦 − 6 = − (𝑥 − 2)
                            𝟒                                                 𝟒
                    𝟑                                                     𝟑        𝟑        ✓ SF                        A
          ∴ 6 = −𝟐 + 𝑐                           OR/OF       ∴ 𝑦 − 6 = −𝟒𝑥 + 𝟐
             10                                                      𝟑        𝟑
          ∴ 3 =𝑐                                             ∴ 𝑦 = −𝟒𝑥 + 𝟐 + 6
                    𝟑        𝟏𝟓                                      𝟑        𝟏𝟓            ✓ c-value / -waarde
          ∴ 𝑦 = −𝟒𝑥 + 𝟐                                      ∴ 𝑦 = −𝟒𝑥 + 𝟐                                     CA
                                                                                            ✓ Ans. /Antw. CA
                                                                                                                (4)
 1.7      𝑡𝑎𝑛𝜃 = 𝑚𝑃𝑅
                  3
          𝑡𝑎𝑛𝜃 = −4                                                                         ✓ SF                    CA
                                             3
          ∴ 𝑟𝑒𝑓/𝑣𝑒𝑟𝑤. ∠ = 𝑡𝑎𝑛−1 (4) ≈ 36,87°                                                ✓ ref. ∠ / verw. ∠
          ∴ 𝜃 = 180° − 36,87°                                                                                           CA
          ∴ 𝜃 = 143,13°                                                                     ✓ Ans. /Antw. CA
                                                                                                                        (3)

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(EC/NOVEMBER 2023)   TECHNICAL MATHEMATICS P2/TEGNIESE WISKUNDE V2                   5

1.8        RQ = √(𝑥2 − 𝑥1 )2 + (𝑦2 − 𝑦1 )2                         ✓F                   A
                                                                   ✓ SF                 A
               = √(6 + 1)2 + (3 − 2)2
                                                                   ✓ length/lengte PQ
               = √50                                                                    CA
                      5                                            ✓ cos ratio/verh. CA
           ∴ cos Q =
                     √50                                           ✓ size of / grootte van
             ̂
           ∴ Q = 45°                                               Q                   CA
                                      OR/OF                                OR/OF

           PR = √(𝑥2 − 𝑥1 )2 + (𝑦2 − 𝑦1 )2                         ✓F                    A
                                                                   ✓ SF                  A
              = √(6 − 2)2 + (3 − 6)2
                                                                   ✓ length/lengte PR
              =5
                                                                                        CA
                                                                   ✓ tan ratio/verh. CA
                       5
           ∴ tan 𝑄 =                                               ✓ size of / grootte van
                       5                                           Q                   CA
           ∴̂
            Q = 45°                                                                        (5)
                                                                                          [26]

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6          TECHNICAL MATHEMATICS P2/TEGNIESE WISKUNDE V2                                      (EC/NOVEMBER 2023)

QUESTION/VRAAG 2

2.1.1   tan(30,5˚ + 130,5˚) ≈ −0,34                                              ✓ SF                    A
                                                                                 ✓ −0,34                 A
                                                AO: Full marks / Volpunte                               (2)
2.1.2   cosec(130,5° − 30,5°)                                                    ✓ SF                    A
              1
        = sin(100°)                                                              ✓ reciprocal ratio
                                                                                 /resiprook verh.        A
        ≈ 1,02                                                                   ✓ 1,02                  A
                                                AO: Full marks / Volpunte                               (3)
2.2.1

                                      54°           (1)2 = 𝑘 2 + 𝑥 2             ✓ Pythagoras           A
                          1                         1 − 𝑘2 = 𝑥2
                                            𝑘                                    ✓ Diagram               A
                                                    ±√1 − 𝑘 2 = 𝑥

                    36°                             ∴ 𝑥 = √1 − 𝑘 2
                          √1 − 𝑘 2                                               ✓𝑥 = √1 − 𝑘2            A

        ∴ cos36° = √1 − k2                                                       ✓ √1 − 𝑘 2        CA
                                                                                                    (4)
2.2.2   sin(216 °) = 𝑠𝑖𝑛(180° + 36°)                                             ✓ Reduction/reduksie
        sin(216 °) = −𝑠𝑖𝑛36°                                                                        A
        sin(216 °) = −𝑘
                                                                                 ✓Ans. / Antw.         CA
                                                                                                        (2)
2.3     𝑡𝑎𝑛𝜃 = 2𝑠𝑖𝑛38,1°
        𝑡𝑎𝑛𝜃 = 1,234 …                                                           ✓ 1,234 …               A
        𝑟𝑒𝑓/𝑣𝑒𝑟𝑤. ∠ ≈ 50,98°                                                     ✓ ref/verw. ∠           A
        ∴ 𝑄1: 𝜃 = 50,98°
                                                                                 ✓ Quadrants/kwadrante
                                     AND/EN                                                           A
                                                                                 ✓ Both answers / beide
        ∴ 𝑄3: 𝜃 = 180° + 50,98° = 230,98°                                        antwoorde          CA
                                                                                                     (4)
                                                                                                   [15]

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(EC/NOVEMBER 2023)     TECHNICAL MATHEMATICS P2/TEGNIESE WISKUNDE V2                        7

QUESTION/VRAAG 3

3.1                          1                                             ✓ 𝑐𝑜𝑠𝜃           A
        cos(360° − 𝜃).                . tan (360° + 𝜃)
                       cot(180° + 𝜃)                                           1
                                                                           ✓ 𝑐𝑜𝑡𝜃           A
                 cos(180° + 𝜃). 𝑡𝑎𝑛(180° − 𝜃)
                                                                           ✓ 𝑡𝑎𝑛𝜃           A
                   1
            𝑐𝑜𝑠𝜃. 𝑐𝑜𝑡𝜃 . 𝑡𝑎𝑛𝜃                                              ✓ −𝑐𝑜𝑠𝜃          A
        =                                                                  ✓ −𝑡𝑎𝑛𝜃          A
           −cos𝜃. −𝑡𝑎𝑛𝜃
           1                                                               ✓ 𝑡𝑎𝑛𝜃          CA
        =
          cotθ

        = 𝑡𝑎𝑛𝜃
                                                                                            (6)
3.2              1 2     1+ 𝑠𝑖𝑛𝑥
        (𝑡𝑎𝑛𝑥 +      ) =
                𝑐𝑜𝑠𝑥     1−𝑠𝑖𝑛𝑥

                                    1 2
        ∴ 𝐿𝐻𝑆 = (𝑡𝑎𝑛𝑥 +                 )                                      𝑠𝑖𝑛𝑥
                                   𝑐𝑜𝑠𝑥
                                                                           ✓ 𝑐𝑜𝑠𝑥            A
                  𝑠𝑖𝑛𝑥    1 2
         ∴ 𝐿𝐻𝑆 = (𝑐𝑜𝑠𝑥 + 𝑐𝑜𝑠𝑥)
                      𝑠𝑖𝑛𝑥+1 2                                                 (𝒔𝒊𝒏𝒙+𝟏)𝟐
        ∴ 𝐿𝐻𝑆 = ( 𝑐𝑜𝑠𝑥 )                                                   ✓               CA
                                                                                 𝒄𝒐𝒔𝟐 𝒙
                     (𝑠𝑖𝑛𝑥 + 1)2
        ∴ 𝐿𝐻𝑆 =        𝑐𝑜𝑠2 𝑥                                              ✓ 1 − 𝑠𝑖𝑛2 𝑥      A
                (𝑠𝑖𝑛𝑥 + 1)(𝑠𝑖𝑛𝑥 + 1)
        ∴ 𝐿𝐻𝑆 =
                      1−𝑠𝑖𝑛2 𝑥                                             ✓ LHS = RHS
                (𝑠𝑖𝑛𝑥 + 1)(𝑠𝑖𝑛𝑥 + 1)
        ∴ 𝐿𝐻𝑆 = (1−𝑠𝑖𝑛𝑥)(1 + 𝑠𝑖𝑛𝑥)
                     1+𝑠𝑖𝑛𝑥
        ∴ 𝐿𝐻𝑆 =             = 𝑅𝐻𝑆
                     1−𝑠𝑖𝑛𝑥                                                                 (4)
                                                                                           [10]

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8            TECHNICAL MATHEMATICS P2/TEGNIESE WISKUNDE V2              (EC/NOVEMBER 2023)

QUESTION/VRAAG 4

4.1                                                                𝒇(𝒙):
                                                                   ✓ both x-int. /
                                                                   albei x-afsnitte      A
                                                                   ✓ y-int. / y-afsnit ✓
        𝑔(𝑥)                                                       Shape / vorm          A
                                                                   𝒈(𝒙):
        𝑓(𝑥)                                                       ✓ both x-int. /
                                                                    albei x-afsnitte     A
                                                                   ✓ y-int. / y-afsnit   A
                                                                   ✓ Shape / vorm        A
                                                                   ✓ Turning points /
                                                                    draaipunte           A

                                                                                        (7)
4.2   𝑦 ∈ [0 ; 2 ]                                                 ✓ Notation / notasie A
                                         OR/OF                     ✓ start- and endpoints /
      0≤𝑦≤2                                                        begin- en eindpunte CA
                                                                                        (2)
4.3   360                                                         ✓Ans. / Antw.         A
                                                                                        (1)
4.4   90° ≤ 𝑥 ≤ 270°                                               ✓ 90° ≤             CA
                                                                   ✓ ≤ 270°            CA
                                                                                        (2)
                                                                                       [12]

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(EC/NOVEMBER 2023)   TECHNICAL MATHEMATICS P2/TEGNIESE WISKUNDE V2                         9

 QUESTION/VRAAG 5

                                                    C
             B
                 120°

           1 600
           m

                 40°

           A                             2 400 m                            D

 5.1     BĈA = 180° − 120° − 40°                                    ✓ ST ✓ RE
         BĈA = 20° (int. ∠of ∆ / binne ∠ van ∆)                                           (2)
 5.2       AC         AB
                 =
             ̂
         sinABC sinBĈA                                              ✓ SF                 CA
            AC      1600
                  =                                                  ✓S               CA
         sin120° sin20°
                1600                                                 ✓ Rounded Ans. /
         AC =         × sin120°
               sin20°                                                Afgeronde Antw.
                                                                                      CA
         AC = 4 051 m                                                NPU
                                                                                       (3)
 5.3                     1
         Area ∆ABC = 2 . a. b. sinC OR/OF
                     1                                               ✓F                     A
         Area ∆ABC = . AB. AC. sinBA ̂C
                         2
                         1
         Area ∆ABC = 2 (1600)(4051)sin40°                            ✓ SF                 CA
         Area ∆ABC = 2 083 146,085 m2
                                                                     ✓Ans. / Antw.         A
          ̂ D = 50° (compl. ∠’s / kompl. ∠’e)
         CA
                       1
         Area ∆ABC = 2 . a. b. sinC OR /OF
                       1
         Area ∆ABC = . AC. AD. sinCA ̂D
                         2
                         1
         Area ∆ABC = 2 (2400)(4051)sin50°
         Area ∆ABC = 3 723 895,247 m2                                ✓Ans. / Antw.         A

         ∴ Total Area = 2 083 146,085 + 3 723 895,247                ✓M                     A
         ∴ Totale Opperv. = 5 807 041,33 m2                          ✓ Ans. / Antw.         A
                                                                     NPU
                                                                                           (6)
                                                                                          [11]

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10         TECHNICAL MATHEMATICS P2/TEGNIESE WISKUNDE V2                                 (EC/NOVEMBER 2023)

QUESTION/VRAAG 6

6.1     Double or Twice/Dubbel of Twee keer                                       ✓Ans. / Antw.      (1)
6.2                                                       A

                                                        48°

                                                   O
                                                   𝑥

                                     1
                                     2   𝑦                                1
                             C                                        2
                                                                              B

6.2.1   𝑥 = 48° × 2 = 96°                                                         ✓ ST ✓ RE
        (∠ at centre = 2 × ∠ at circumf. / middelpts ∠ = 2 × omtreks ∠)                               (2)
6.2.2   OB = OC (radii)
        Ĉ2 = ̂
              B2 = 𝑦 (∠’s opp = sides / ∠’e teenoor = sye)                        ✓ ST ✓RE
               180°−96°
        ∴𝑦=             = 42° (int. ∠of ∆ / binne ∠ van ∆)
                   2                                                                                  (2)
6.3     Equal / gelyk                                                             ✓Ans. / Antw.      (1)
6.4
                                                                  S
                                                              𝑧

                                                                          𝑥 R
                                               O

                            120° 1                            𝑦
           T                                                      Q
                                   P

6.4.1   𝑥 = 120° (ext. ∠ of cq / buite ∠ van kvh)                                 ✓ ST ✓ RE          (2)
6.4.2   𝑦 = 90° (∠ in semi-circle / ∠ in semi-sirkel)                             ✓ ST ✓ RE          (2)
6.4.3   𝑧 = 30° (ext. ∠ of ∆/ buite ∠ van ∆)                                      ✓ ST ✓ RE          (2)
                                                                                                    [12]

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(EC/NOVEMBER 2023)   TECHNICAL MATHEMATICS P2/TEGNIESE WISKUNDE V2                                     11

QUESTION/VRAAG 7

7.1        equal / gelyk                                                                ✓Ans. / Antw.         (1)
7.2

7.2.1      𝐶̂4 = 25° (tan-chord / raaklyn koord)                                      ✓ ST ✓ RE              (2)
7.2.2      𝐶̂3 = 42° (∠’s in same seg. / ∠’e in dieselfde seg.)                       ✓ ST ✓ RE              (2)
7.2.3      𝐵𝐶̂ 𝐷 = 90° (∠ in semi-circle / sirkel)                                    ✓ ST ✓ RE
           ̂1 = 65° (int. ∠of ∆ / binne ∠ van ∆)
           𝐷                                                                          ✓ ST ✓ RE              (4)
7.3        outside / buite                                                            ✓Ans. / Antw.          (1)
7.4                                          S                                            P
                           K             1     4
                                             23

                                         2 3       M
                                            4
                                         O1
                               T                   2
                                         100°              1
                                                       3       10°
                                                           R

7.4.1      OQ = OR (radii)
           𝑆̂3 = 10° (∠’s opp = sides / ∠’e teenoor = sye)                            ✓ ST ✓RE
           ∴ 𝑆̂2 = 40°                                                                ✓ ST
           (∠ at centre = 2 × ∠ at circumf. / middelpts ∠ = 2 × omtreks ∠)            ✓ RE                   (4)
7.4.2      𝑆̂4 + 𝑆̂3 = 90°                                                            ✓ ST
           ∴ 𝑆̂4 = 80° (tan ⊥radius)                                                  ✓ RE                   (2)
7.4.3      𝑅̂1 = 80° tan from same pt. / 𝑟𝑎𝑎𝑘𝑙𝑦𝑛 𝑢𝑖𝑡 𝑑𝑖𝑒𝑠𝑒𝑙𝑓𝑑𝑒 𝑝𝑡.)                   ✓ ST ✓ RE
           𝑃̂ = 20° (int. ∠of ∆ / binne ∠ van ∆)                                      ✓ ST ✓ RE
                                                                                                              (4)
                                                                                                             [20]

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12         TECHNICAL MATHEMATICS P2/TEGNIESE WISKUNDE V2                     (EC/NOVEMBER 2023)

QUESTION/VRAAG 8

8.1   Perpendicular / loodreg                                      ✓Ans. / Antw.        (1)
8.2                                               B

                                   E
                                          8
                                          D
                                              𝑥
                                         12
                                                  O
                              A

8.2.1 𝑂𝐸 = 𝑥 + 8                                                  ✓ Ans. / Antw.       (1)
8.2.2 𝑂𝐴2 = 𝑥 2 + (12)2 (Pyth)                                    ✓ ST ✓RE
      𝑂𝐴2 = 𝑥 2 + 144
      𝑂𝐴 = ±√𝑥 2 + 144                                            ✓ Answer / Antw.CA
      ∴ 𝑂𝐴 = √𝑥 2 + 144                                                            (3)
8.2.3 𝑥 + 8 = √𝑥 2 + 144                                          ✓M                     A
      (𝑥 + 8)2 = 𝑥 2 + 144                                        ✓S                     A
      𝑥 2 + 16𝑥 + 64 = 𝑥 2 + 144
      16𝑥 = 80                                                    ✓S                   CA
      𝑥=5                                                         ✓Ans. / Antw.        CA
                                                                                        (4)
8.2.4 𝑟 = 13                                                      ✓Ans. / Antw.        (1)
                                                                                       [10]

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(EC/NOVEMBER 2023)   TECHNICAL MATHEMATICS P2/TEGNIESE WISKUNDE V2                  13

QUESTION/VRAAG 9

9.1        𝜔 = 2𝜋𝑛                                                  ✓F               A
           𝜔 = 2𝜋(12)                                               ✓ SF            CA
           𝜔 = 24𝜋                                                  ✓Answer/Antw.CA
           𝜔 ≈ 75,40 rad. / sec                                     NPU
                                                                                     (3)
9.2        𝐷 = 80 mm                                                ✓diameter/middellyn
           𝑉 = 𝜋𝐷𝑛                                                                   A
           𝑉 = 𝜋(80)(20)                                            ✓F               A
           𝑉 = 1 600𝜋                                               ✓ SF            CA
           𝑉 ≈ 5 026,55 mm/min                                      ✓Answer/Antw. CA
                                                                    NPU
                                                                                     (4)
9.3        500 mm = 50 cm                                           ✓conv. /herleid. A
           4ℎ2 − 4𝑑ℎ + 𝑥 2 = 0                                      ✓F               A
           4ℎ2 − 4(56,6)ℎ + (50)2 = 0                               ✓ SF            CA
           4ℎ2 − 226,4ℎ + 2500 = 0
           ÷ 4: ℎ2 − 56,6ℎ + 625 = 0
               −𝑏 ± √𝑏 2 − 4𝑎𝑐
           ℎ=
                      2𝑎                                            ✓ SF                  CA
               −(−56,6) ± √(−56,6)2 − 4(1)(625)
           ℎ=
                               2(1)                                 ✓ Both answers/
           ∴ ℎ ≈ 41,56 or ℎ ≈ 15,04                                 beide antwoorde CA
           ∴ ℎ = 15,04 cm                                           ✓ Answer/Antw. CA
                                                                    NPU
                                                                                     (6)

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14         TECHNICAL MATHEMATICS P2/TEGNIESE WISKUNDE V2                  (EC/NOVEMBER 2023)

 9.4

                                              2m

                                       𝜃                              2,5 m

 9.4.1     𝑠 = 𝑟𝜃                                                      ✓F             A
           2,5 = 2𝜃                                                    ✓ SF         CA
           1,25 rad = 𝜃                                                ✓Answer/Antw.CA
                                                                                     (3)
 9.4.2     Area =
                     r2 θ                                              ✓F             A
                      2                                                ✓ SF         CA
                     (2)2 (1,25)
           Area =     2
                                                                       ✓Ans./Antw. CA
           Area = 2,5 cm2                                              NPU
                                                                                     (3)
                                           OR/OF
                    rs
           Area = 2                                                    ✓F                   A
                    (2)(2,5)                                           ✓ SF                CA
           Area = 2                                                    ✓Ans./Antw.         CA
           Area = 2,5 cm2                                              NPU
                                                                                     (3)
 9.4.3     𝐶 = 2𝜋𝑟                                                     ✓F             A
           2,5 = 2𝜋𝑟                                                   ✓ SF           A
           0,40 = 𝑟                                                    ✓Answer/Antw.CA

           (2)2 = ℎ2 + (0,40)2                                         ✓M                      A
           (2)2 − (0,40)2 = ℎ2
            3,84 = ℎ2
           1,96 m = ℎ                                                  ✓Answer/Antw.CA
                                                                       NPU
                                                                                     (5)
 9.5       VolShell = Volouter − Volinner                              ✓M             A
                      4           4
           VolShell = 3 π(5,5)3 − 3 π(3,5)3                            ✓ SF           A
                         1331       343
           VolShell =           π− 6 π                                 ✓Answer/Antw.CA
                           6
                         494       3
           VolShell = 3 π cm
                                   494                                 ✓M                      A
           ∴ Mass/𝐺𝑒𝑤𝑖𝑔 = 3 π × 30
           ∴ Mass/𝐺𝑒𝑤𝑖𝑔 = 4940π
           ∴ Mass/𝐺𝑒𝑤𝑖𝑔 = 15519,47 grams                               ✓Ans./Antw.         CA
                                                                       NPU
                                                                                            (5)
                                                                                           [29]

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(EC/NOVEMBER 2023)   TECHNICAL MATHEMATICS P2/TEGNIESE WISKUNDE V2                                                          15

 QUESTION/VRAAG 10

                      12 cm         𝑥 cm              13 cm            11 cm           11,8 cm       18 cm

                                                                      25 cm
                             𝑂 +𝑂
             𝐴𝑟𝑒𝑎 = 𝑎 ( 1 2 𝑛 + 𝑂2 + 𝑂3 +. . . +𝑂𝑛−1 )                                                        ✓F                   A
                      25 12+18
                                                                                                              ✓𝑎=5                 A
             329 = 5 ( 2 + 𝑥 + 13 + 11 + 11,8)                                                                ✓ SF                CA
             329 = 5(𝑥 + 50,8)                                                                                ✓S                  CA
             65,8 = 𝑥 + 50,8                                                                                  ✓ 𝑥 = 15            CA
             15 = 𝑥
                                OR / OF                                                                             OR / OF
             𝐴𝑟𝑒𝑎 = 𝑎(𝑚1 + 𝑚2 + 𝑚3 +. . . +𝑚𝑛−1 )                                                             ✓F                   A
                      25 12 + 𝑥         𝑥 + 13       13 + 11       11 + 11,8       11,8 + 18                  ✓𝑎=5                 A
             329 = 5 (              +            +             +               +            )                 ✓ SF                CA
                              2           2            2              2               2             25
                         12 + 𝑥        𝑥 + 13
                                                                                                 𝑎=           ✓S                  CA
             329 = 5 (             +            + 12 + 11,4 + 14,9)                                  5
                             2           2                                                        𝑎=5         ✓ 𝑥 = 15            CA
                         25 + 2𝑥
             329 = 5 (              + 38,3)
                              2
                      25 + 2𝑥
             65,8 =               + 38,3
                         2
                      25 + 2𝑥
             27,5 =      2

             55 = 25 + 2𝑥
             30 = 2𝑥
             15 = 𝑥                                                                                                               (5)
                                                                                                                                  [5]

                                                                                                          TOTAL/TOTAAL: 150

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