NATIONAL
SENIOR CERTIFICATE
NASIONALE
SENIOR SERTIFIKAAT
GRADE/GRAAD 12
JUNE/JUNIE 2021
MATHEMATICS P2/WISKUNDE V2
MARKING GUIDELINE/NASIENRIGLYN
(EXEMPLAR/EKSEMPLAAR)
MARKS/PUNTE: 150
This marking guideline consists of 17 pages.
Hierdie nasienriglyn bestaan uit 17 bladsye.
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Mathematics Grade 12 P2 Eastern Cape June 2021 Memo (Afr)
Grade 12 Mathematics Paper 2 memorandum from the Eastern Cape June 2021 (Afrikaans), 17 pages. Read online or download the free PDF.
Mathematics · Grade 12 · Eastern Cape June · 2021. Memorandum, 17 pages. Read online or download the PDF.
- Subject
- Mathematics
- Grade
- Grade 12
- Document type
- Memorandum
- Year
- 2021
- Exam period
- Eastern Cape June
- Paper
- 2
- Curriculum
- CAPS
- Pages
- 17
- File size
- 711.8 KB
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This exam
Eastern Cape June 2021
Questions in this paper
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2 MATHEMATICS P2/WISKUNDE V2 (EC/JUNE/2021)
QUESTION 1/VRAAG 1
1.1 a = 62 ✓ value of a / waarde van a
b = 51 ✓ value of b / waarde van b
c = 42 ✓ value of c / waarde van c
d = 35 ✓ value of d / waarde van d
e = 31 ✓ value of e / waarde van e
(5)
1.2 Skewed to the right / Skeef na regs ✓ answer / antwoord
OR/OF
Positively skewed / Positief skeef
(1)
1.3 Yes / Ja ✓ Yes / Ja
Q3 = 51 and the upper 25% is from Q3 above. ✓Reason / Rede
Q3 = 51 en die boonste 25% is vanaf Q3 en op. (2)
[8]
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(EC/JUNE 2021) MATHEMATICS P2/WISKUNDE V2 3
QUESTION 2/VRAAG 2
2.1 Positive impact / Positiewe impak ✓ Positive impact
Positiewe impak
The number of learners obtaining lower marks decreased while ✓ Reason / Rede
those obtaining higher marks increased in the Post Test.
Die aantal leerders wat laer punte behaal het, het verminder
terwyl die wat hoër punte behaal het in die na-toets vermeerder
het. (2)
2.2 20 x 30 ✓ answer / antwoord (1)
2.3 Less / Minder ✓answer / antwoord (1)
2.4
Frequency / Frekwensie
Frequency Cumulative Frequency ✓ Pre-Test / Voor Toets
Marks Frekwensie Kumulatiewe Frekwensie ✓ Post Test / Na Toets
Punte Pre-Test Post Test Pre-Test Post Test
Voor Toets Na Toets Voor Toets Na Toets Cumulative Frequency
0 ≤ x < 10 16 5 16 5 Kumulatiewe Frekwensie
10 ≤ x < 20 28 18 44 23 ✓ Pre-Test / Voor Toets
20 ≤ x < 30 34 25 78 48 ✓ Post Test / Na Toets
30 ≤ x < 40 12 32 90 80
40 ≤ x < 50 0 10 90 90
(4)
2.5
Ogives for Pre and Post Tests
Ogiewe vir Voor en Na Toetse
100
90
Cumulative Frequency
✓ grounding / anker
80
70 ✓ upper limits used
60 boonste limiete
50
Kumulatiewe Frekwensie
40 ✓ shape / vorm
30
20
10
0
0 10 20 30 40 50 60
Marks / Punte
Pre-test Post-test
Voor toets Na toets (3)
2.6 Pre: 90 – 78 = 12 learners obtained 60% and more ✓ 12
Post: 90 – 48 = 42 learners obtained 60% and more ✓ 42
Therefore, the teacher achieved the target. ✓ conclusion
Voor - toets: 90 – 78 = 12 leerders het 60% en meer behaal gevolgtrekking
Na - toets: 90 – 48 = 42 leerders het 60% en meer behaal
Daarom het die onderwyser die doelwit behaal (3)
[14]
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4 MATHEMATICS P2/WISKUNDE V2 (EC/JUNE/2021)
QUESTION 3/VRAAG 3
3.1 t=2 ✓ value of t / waarde van t
(1)
3.2.1 PR = ( x2 − x1 ) + ( y2 − y1 )
2 2
= (−5 − 2 ) 2 + ( 0 − 6 ) 2 ✓substitution / vervanging
✓answer / antwoord
= 85 (2)
3.2.2 y2 − y1 0−6
mPR = = ✓substitution / vervanging
x2 − x1 −5−2
6 ✓gradient of PR
=
7 gradiënt van PR
(2)
3.3 6
tan RPS =
7 6
✓ tan =
7
RPS = 40, 6
✓ value of / waarde van PRQ
40, 6 + PRQ = 90 (ext. of / buite van ) ✓ method / metode
✓ reason / rede
PRQ = 49, 4
✓value of / waarde van RPS
(5)
3.4 6
mPR =
7
−4 − 0 −4 ✓ substitution / vervanging
mPQ = = ✓ gradient of PR / gradiënt van PR
2 − (−5) 7
6 4 24 ✓ method / metode
mPR mPQ = − = − − 1
7 7 49
✓ conclusion / gevolgtrekking
PRQ is not right angled at R
PRQ is nie reghoekig by R nie
OR / OF OR / OF
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(EC/JUNE 2021) MATHEMATICS P2/WISKUNDE V2 5
PQ = (−5 − 2) 2 + (0 − (−4)) 2 ✓ substitution / vervanging
= 65
RQ 2 =100
✓ squares / vierkante
PR 2 = 85
PQ 2 = 65
RQ 2 PR 2 + PQ 2 ✓ RQ2 RP 2 + PQ2
PQR is not right angled at P
✓ conclusion / gevolgtrekking
PRQ is nie reghoekig by R nie
(4)
3.5 4
mnewline = mPQ = − ✓ gradient of new line
7
4 gradiënt van nuwe lyn
y − 0 = − ( x − 0)
7 ✓ substitution / vervanging
4
y = − x
7 ✓equation / vergelyking
(3)
3.6 SP = 7 units / eenhede ✓ length of SP / lengte van SP
SR = 6 units / eenhede
RQ = 10 units / eenhede ✓ length of RQ / lengte van RQ
Area of SPR / Oppervlakte van SPR
1 ✓ Area of /Oppervlakte van SPR
= 7 6
2
= 21 units 2 /eenhede 2
Area of RPQ / Oppervlakte van RPQ
1 ✓ Area of /Oppervlakte vanRPQ
= 7 10
2
= 35 units 2 / eenhede2
Area of SPR Oppervlakte van SPR
/
Area of PRQ Oppervlakte van PRQ
21
=
35
3
= ✓answer/antwoord
5 (5)
[22]
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6 MATHEMATICS P2/WISKUNDE V2 (EC/JUNE/2021)
QUESTION 4/VRAAG 4
4.1.1 x2 + y 2 + 6x − 6 y + 9 = 0
✓ method / metode
x2 + 6x + 9 + y 2 − 6 y + 9 = − 9 + 9 + 9
✓ ( x + 3)2 + ( y − 3) 2 = 9
( x + 3) 2 + ( y − 3) 2 = 9 ✓ coordinates of L
L ( −3;3) and/en r = 3units/eenhede koördinate van L
✓ value of r / waarde van r
(4)
4.1.2 − 5 + xM 5 + yM
−3 = 3= ✓ method / metode
2 2
✓ value of x / waarde van x
xM = −1 yM = 1 ✓ value of y / waarde van y
M ( −1;1)
(3)
4.1.3 5 −1 3 −1 ✓ mLM OR mKM
mKL = = − 1 OR mLM = = −1
−5 + 1 −3 + 1 ✓ mtangent
mtangent = 1
y − 1 =1( x − (−1) ) ✓ substitution / vervanging
y=x+2 ✓ equation / vergelyking
(4)
4.1.4 ( x + 3) + ( y − 3) = 9
2 2
( 0 + 3) 2 + ( y − 3) 2 = 9
( y − 3) 2 = 0
y =3 ✓ value of x / waarde van x
✓ value of y / waarde van y
N ( 0;3)
(2)
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(EC/JUNE 2021) MATHEMATICS P2/WISKUNDE V2 7
4.2.1 L ( – 3 ; 3) ✓ value of x / waarde van x
L/ (2 ; –4) ✓ value of y / waarde van y
(2)
4.2.2 − 4 −1 5 ✓ mML/
mML/ = =−
2 +1 3
5
y − (1) = − ( x + 1) ✓substitution / vervanging
3
5 2
y=− x− ✓equation / vergelyking
3 3
Not passing through the origin ✓ conclusion / gevolgtrekking
Gaan nie deur die oorsprong nie (4)
[19]
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8 MATHEMATICS P2/WISKUNDE V2 (EC/JUNE/2021)
QUESTION/VRAAG 5
5.1.1 5 3
sin = − tan = −
13 and/en 4
✓ value of x / waarde van x
x = −12 r =5
✓ value of r / waarde van r
sin( + ) = sin cos + cos sin ✓ expansion / uitbreiding
−5 −4 −12 3
= + ✓ substitution / vervanging
13 5 13 5
16
=−
65 ✓ answer / antwoord
(5)
5.1.2 cos 2 =1 − 2sin 2
2 ✓ expansion / uitbreiding
3 ✓ substitution / vervanging
= 1− 2
5
7
= ✓ answer / antwoord
25
(3)
5.1.3 tan (− −180) = − tan (180 + )
= − tan ✓ reduction / reduksie
−5 5
= − =−
−12 12 ✓ substitution / vervanging
(2)
5.2.1 1 − cos = 0 or sin = 0
cos =1 or sin = 0
✓ method / metode
=180. k (k ) ✓ answer / antwoord
OR / OF
= 360.k or =180+ 360. k (k ) (2)
5.2.2 sin cos
LHS/LK = −
1 − cos sin
sin 2 − cos (1 − cos ) ✓ common denominator
=
sin (1 − cos ) gemene noemer
sin 2 − cos + cos 2
= ✓ simplification / vereenvoudiging
sin (1 − cos )
1 − cos ✓ identity / identiteit
=
sin (1 − cos )
✓ simplification / vereenvoudiging
1
=
sin
= RHS/RK
(4)
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(EC/JUNE 2021) MATHEMATICS P2/WISKUNDE V2 9
5.3 sin ( x − y )
LHS/LK =
cos x.cos y
sin x cos y − cos x sin y ✓ identity / identiteit
=
cos x.cos y
sin x cos y cos x sin y
= − ✓method / metode
cos x.cos y cos x.cos y
= tan x − tan y ✓ simplification / vereenvoudiging
= 3k − 2k
= k ✓substitution / vervanging
(4)
[20]
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10 MATHEMATICS P2/WISKUNDE V2 (EC/JUNE/2021)
QUESTION 6/VRAAG 6
6.1.1 1 ✓1
(1)
6.1.2 120° ✓ 120°
(1)
6.2 f ( x) = g ( x)
cos ( x − 60) = sin 3 x ✓ cos(x − 60) = cos(90− 3x)
cos ( x − 60) = cos (90 − 3 x) ✓ without cos
sonder cos
( x − 60) = 90 − 3 x + k .360 (k ) ✓ simplification
vereenvoudiging
x − 60 = 90 − 3x + k .360 or / of − x + 60 = 90 − 3x + k .360
4 x =150 + k .360 or / of 2 x = 30 + k .360 ✓ x = 30 + k.90 or / of
x =15 + k.180
x = 37,5 + k .90 or / of x = 15 + k .180 ✓ two values
twee waardes
x {37,5, − 52,5;15 ; 127,5} ✓ two remaining values
twee oorblywende waardes
(6)
6.3
f:
✓ endpoints / eindpunte
✓ both intercepts
beide afsnitte
✓ shape / vorm
g:
✓ both intercepts
beide afsnitte
✓ shape / vorm
(5)
6.4 x =− 30 or/of x =150 ✓both values of x
beide waardes van x
(1)
6.5 f ( x) = cos( x − 60+15) ✓h(x) = cos (x – 45°)
h(x) = cos (x – 45°) (1)
[15]
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(EC/JUNE 2021) MATHEMATICS P2/WISKUNDE V2 11
QUESTION 7/VRAAG 7
52 = 42 + 52 − 2(4)(5) cos A ✓ substitution into cosine rule / vervanging in die cosinusreël
2
cos A = ✓ value of cos A / waarde van cos A
5
42 = 52 + 52 − 2(5)(5) cos B ✓ substitution into cosine rule / vervanging in die cosinusreël
17
cos B = ✓ value of cos B / waarde van cos B
25
2 17
cos A − cos B = −
5 25
7
= − − 0, 28 ✓ value of cos A – cos B / waarde van cos A – cos B
25 (5)
[5]
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12 MATHEMATICS P2/WISKUNDE V2 (EC/JUNE/2021)
QUESTION 8/VRAAG 8
OM ⊥ CD (line from centre which bisects the chord) ✓ S/R
(lyn vanaf die middelpunt wat koord halveer )
AO = OB = OD =11cm ✓S
In OMD: ✓ use of Pythagoras theorem
gebruik van Pythagoras -
MD 2 + 7 2 =112 (Pythagoras theorem/stelling ) stelling
MD = 6 2
✓ length of MD/lengte van MD
CD =12 2 ✓ length of CD/lengte van CD
(5)
[5]
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(EC/JUNE 2021) MATHEMATICS P2/WISKUNDE V2 13
QUESTION 9/VRAAG 9
9.1
R 2 = Q2 ( s in the same segment/e in dieselfde segment )
✓ S/R
U 4 = U1 ( vert .opp. s / regoorst. e) ✓ S/R
S2 = T 2 ( s in the same segment / e in dieselfde segment ) ✓ S/R
RUS ||| QUT () (3)
9.2 ✓ S/R
S2 = T 2 = x (s in the same seg / e in dieselfde segment)
✓S
U3 =S2 = x (tan-chord theorem / raaklyn-koord stelling) ✓R
U 6 = U3 = x (vertically opp. s / regoorst. e)
✓S/R
(4)
9.3.1 R1 + x + 90 − x = 180 ( sum of s of / som van die e van )
✓S
✓ value of R 1 /
R1 = 90
waarde van R 1
QT is a diameter (QT subtends a right angle) ✓ QT is a diameter/
is ’n middellyn
QT is ' n middellyn (QT onderspan ' n reghoek )
✓R
(4)
9.3.2
P = 90 ( in thesemicircle / in ' n semisirkel ) ✓S
OR / OF ✓R
P + 90 =180 (opp. s of a cyclic quad /
teenoorst. e van ' n koordevierhoek )
P = 90 (2)
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14 MATHEMATICS P2/WISKUNDE V2 (EC/JUNE/2021)
9.4.1
Q2 = T 2 = x (s opp. equal sides / e teenoor gelyke sye)
✓ S/R
Q 2 = S2
RS|| QT (Alt. s are equal / Verw. e is gelyk )
✓R
(2)
9.4.2
U 2 = Q2 = x
✓S
VW is a tangent to circle passing through QUT ✓R
(Converse of tan-chord theorem)
VW is 'n raaklyn aan die sirkel wat deur QUT gaan
(Omgekeerde van die raaklyn − koord stelling ) (2)
[17]
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(EC/JUNE 2021) MATHEMATICS P2/WISKUNDE V2 15
QUESTION 10/VRAAG 10
10.1
Construction: Draw diameter GOE. Join EH ✓ construction / konstruksie
Konstruksie: Trek middellyn GOE. Verbind EH
Proof/Bewys: ✓ S/R
G1 + G 2 = 90 (tangent ⊥ diameter) / ✓ S/R
(raaklyn ⊥ radius)
EHG = 90 ( in thesemi circle) /
✓S
( in semi - sirkel )
G 2 + E = 90 (sum of s of Δ) /
(som van die e van ' n ) ✓ S/R
G1 + G 2 = G 2 + E
G1 = E
But/Maar: E = F (s in thesamesegment)/
(e in dieselfde segment )
DGH = F
(5)
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16 MATHEMATICS P2/WISKUNDE V2 (EC/JUNE/2021)
10.2
10.2.1 Kite / Vlieër ✓ answer / antwoord
(1)
10.2.2
KLO = 90 (tan ⊥ rad.) / (raaklyn ⊥ radius)
✓S ✓R
KPO = 90 (tan ⊥ rad.) / (raaklyn ⊥ radius) ✓S
MLP = 90 (s in thesemi circle) / (ein ' n semi - sirkel ) ✓S ✓R
(5)
10.2.3
KLO + KPO = 90 + 90
= 180 ✓S
KLOP is a cyclic quad. (Opp. s are supp.) ✓R
KLOP is ' n koordevierhoek (Teenoorst. e is suppl.) (2)
10.2.4
K + LOP =180 (Opp. s of cyclic quad.)
✓S✓R
But M = 67 ( s opp.equalsides)
✓ S/R
LOP = 67 + 67 (Ext. of ) ✓ value of LOP
=134 ˆ
waarde van LOP
K + 134 =180 ✓value of K / waarde
K = 46 van K
OR/OF
OR/OF
M = 67 ( s opp. = sides)
✓S✓R
LOM = 46 ( s of ) ✓value of / waarde van
K = 46 (ext. of cyclic quad.) LOM
✓value of / waarde van
K
✓reason / rede
(5)
[18]
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(EC/JUNE 2021) MATHEMATICS P2/WISKUNDE V2 17
QUESTION 11/VRAAG 11
AP 3
= (Prop.theorem; PQ||BC ) ✓ S/R
PB 5
(Verhouding stelling ; PQ||BC)
✓S
AP 3
=
PR + BR 5 ✓ simplification / vereenvoudiging
5AP = 3PR + 3BR
BR 1
= (Prop.theorem; RS||AC )
RA 3 ✓ S/R
(Verhouding stelling ; RS||AC)
AP 1 ✓S
=
AP + PR 3
✓ simplification / vereenvoudiging
3BR = AP + PR
5AP = 3PR + AP + PR ✓ substitution / vervanging
4AP = 4PR
AP = PR (7)
[7]
TOTAL/TOTAAL: 150
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