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GAUTENGSE DEPARTEMENT VAN ONDERWYS
PROVINSIALE EKSAMEN
JUNIE 2017
GRAAD 11
WISKUNDE
VRAESTEL 2
MEMORANDUM
10 bladsye
1
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Mathematics Grade 11 P2 Gauteng June 2017 Memo (Afrikaans)
Grade 11 Mathematics Paper 2 memorandum from the Gauteng June 2017 (Afrikaans), 10 pages. Read online or download the free PDF.
Mathematics · Grade 11 · Gauteng June · 2017 · Afrikaans. Memorandum, 10 pages. Read online or download the PDF.
- Subject
- Mathematics
- Grade
- Grade 11
- Language
- Afrikaans
- Document type
- Memorandum
- Year
- 2017
- Exam period
- Gauteng June
- Paper
- 2
- Curriculum
- CAPS
- Pages
- 10
- File size
- 1.0 MB
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Wiskunde Vraestel 2
MEMORANDUM
GRAAD 11
GAUTENGSE DEPARTEMENT VAN ONDERWYS
PROVINSIALE EKSAMEN
WISKUNDE Vraestel 2
MEMORANDUM
INSTRUKSIES EN INLIGTING
A – Akkuraatheid
CA – Volgehoue Akkuraatheid
S – Stelling
R – Rede
SR- Stelling/Rede
NOTA:
• Indien ʼn kandidaat ʼn vraag TWEE KEER beantwoord, sien slegs die EERSTE poging na.
• Indien ʼn kandidaat ʼn antwoord DOODGETREK het, maar dit nie oorgedoen het nie, merk die
doodgetrekte antwoord.
• Volgehoue akkuraatheid word in ALLE aspekte van die memorandum toegepas. Hou op nasien by
die tweede berekeningsfout.
• Om antwoorde/waardes te veronderstel om ʼn probleem op te los, word NIE toegelaat NIE.
2
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Wiskunde Vraestel 2
MEMORANDUM
GRAAD 11
VRAAG 1 PUNTE: 25
1.1 𝑀𝑀𝑅 =
6−0 ✓ vervang in korrekte formule (3)
4−0
3
6 3 ✓ 𝑚𝑀𝑅 =
2
= =
4 2
3 ✓ vergelyking van MR
Vergelyking van lyn MR is: 𝑦 = 𝑥
2
1.2 𝑦 − 5𝑥 + 14 = 0 (4)
y = 5x -14 ✓ 𝑚𝑀𝑆 = 5
MS || PR mPR = 5 ✓𝑚𝑃𝑅 = 5
Vergelyking van lyn PR:
𝑦 − 𝑦1 = 𝑚(𝑥 − 𝑥1 )
𝑦 − 4 = 5(𝑥 + 2) ✓verv. (2 ; 4)
𝑦 = 5𝑥 + 14 ✓antwoord
1.3 mPR = 5 (5)
∴ tan 𝛼 = 5 ✓tan 𝛼 = 5
𝛼 = 78,69° ✓78,69°
3
mMR =
2
3
tan 𝛽 =
2
𝛽 = 56,31° ✓56,31°
∴ 𝜃 =𝛼−𝛽 ✓∴ 𝜃 = (𝛼 − 𝛽)..(som van hoeke v.∆)
𝜃 = 22,38° ✓22,38°
1.4 3 (4)
𝑦 = 𝑥 en 𝑦 = 5𝑥 + 14
2
3 3
5𝑥 + 14 = 𝑥 ✓stel 5𝑥 + 14 = 𝑥
2 2
10𝑥 + 28 = 3𝑥
7𝑥 = −28 ✓7𝑥 = −28
𝑥 = −4 ✓ 𝑥 = −4
𝑦 = −6 ✓ 𝑦 = −6
R(4 ; 6)
3
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Wiskunde Vraestel 2
MEMORANDUM
GRAAD 11
1.5 𝑑MR = √(𝑥2 − 𝑥1 )2 + (𝑦2 − 𝑦1 )2 (2)
✓verv. in korrekte formule
= √(4 + 4)2 + (6 + 6)2
= √64 + 144 ✓antwoord
= 4√13
1.6 𝑑PR = √(𝑥2 − 𝑥1 )2 + (𝑦2 − 𝑦1 )2 (5)
✓ verv. in korrekte formule
= √(−4 + 2)2 + (−6 − 4)2
✓√104 OF 2√26
= √104 or 2√26
Oppvl van PMR 1
1 ✓ 2√26. 4√13. sin 22,38° OF
= PR. MR. sin 𝜃 2
1
2
1 √104. 4√13. sin 22,38°
= 2√26. 4√13. sin 22,38° OF 2
1
2 (✓ afronding) antwoord ✓
2
√104. 4√13. sin 22,38°
= 28 𝑒𝑒𝑛ℎ𝑒𝑑𝑒²
1.7 S(2 ; 4) ✓x=2 (2)
✓ y = 4
VRAAG 2 PUNTE: 26
2.1 𝑦2 = 𝑟2 − 𝑥2 ✓diagram in korrekte kwadrant (4)
∴ 𝑦 2 = (25)2 − (−7)2
y
∴ 𝑦 2 = 576
∴ 𝑦 = −24 ✓ 𝑦 = −24
−24 −24
∴ 14 tan 𝜃 = 14 ( ) 0 x ✓tan 𝜃 =
−7 −7
25
= 48 ✓antwoord
(-7: y)
2.2 cos(90°+𝑥).sin(180°+𝑥) (6)
tan 225°−𝑐𝑜𝑠 2 (−𝑥)
(− sin 𝑥)(− sin 𝑥) ✓ (-sinx) (-sinx)
=
tan 45°−𝑐𝑜𝑠 2 𝑥 ✓ tan 45°
sin2 𝑥
= ✓ cos 2 𝑥
1−cos2 𝑥 ✓ tan 45° = 1
sin2 𝑥
= ✓ 1 − cos2 𝑥 = sin2 𝑥
sin2 𝑥 ✓ antwoord
=1
4
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Wiskunde Vraestel 2
MEMORANDUM
GRAAD 11
2.3 2 cos 2𝜃 = −0,44 ✓ cos 2𝜃 = −0,22 (6)
∴ cos 2𝜃 = −0,22 ✓ 77,2909°
∴ Verw. hoek = 77,2909 … ° ✓ 2𝜃 = 180° − 77,2909° + 𝑘. 360°
2𝜃 = 180° − 77,2909 … ° + 𝑘. 360°
∴ 𝜃 = 51,35° + 𝑘. 180, 𝑘 ∈ 𝑍 or ✓ 𝜃 = 51,35° + 𝑘. 180, 𝑘 ∈ 𝑍
2𝜃 = 180° + 77,2909 … ° + 𝑘. 360° ✓ 2θ = 180° + 77,2909° + k.360°
∴ 𝜃 = 128,65° + 𝑘. 180°, 𝑘 ∈ 𝑍 ✓ ∴ 𝜃 = 128,65° + 𝑘. 180°, 𝑘 ∈ 𝑍
2.4 tan 𝜃 − sin 𝜃 (5)
∴ LHS =
1 − cos 𝜃
sin 𝜃 sin 𝜃 ✓ tan 𝜃 =
sin 𝜃
− 1
= cos 𝜃
cos 𝜃
sin 𝜃−sin 𝜃.cos 𝜃
1 − cos 𝜃 ✓
cos 𝜃
sin 𝜃 − sin 𝜃. cos 𝜃
= cos 𝜃
1 − cos 𝜃
sin 𝜃(1 − cos 𝜃) 1 ✓ sin 𝜃(1 − cos 𝜃)
= × ✓×
1
cos 𝜃 1 − cos 𝜃 1−cos 𝜃
sin 𝜃 sin 𝜃
= ✓ = tan 𝜃
cos 𝜃 cos 𝜃
= tan 𝜃
2.5 𝛼 = 90° − 𝛽 ✓cos 20° (5)
cos 20° sin(90° − 𝛽) ✓sin 𝛼 = sin(90° − 𝛽)
∴ −
sin 70° sin(90° − 𝛽)
sin 70° ✓cos 20° = sin 70°
= −1
sin 70°
=1−1 ✓1 − 1
=0 ✓antwoord
5
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Wiskunde Vraestel 2
MEMORANDUM
GRAAD 11
VRAAG 3 PUNTE:14
3.1 ✓ y-afsnit van f (6)
✓ y-afsnit van g
✓✓ beide draaipunte
van g
✓ beide x-afsnitte
van f
✓ beide draaipunte
van f
3.2 2 ✓✓ antwoord (2)
3.3 2 cos x +1 = 1 – sin x ✓ tan x =-2 (6)
sin x = -2 cos x ✓ 63, 4349°
tan x = -2 ✓ x = 116, 57°
Verw. hoek = 63, 4349....° +k.180° met k 𝜖 Z
x = 180° - 63, 4349....° + k. 180° ✓ -63,43°
x = 116, 57° + k.180° met k є Z ✓ 116, 57°
x = -63,43° OF 116,57° OF 296,57° ✓ 296,57°
6
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Wiskunde Vraestel 2
MEMORANDUM
GRAAD 11
VRAAG 4 PUNTE: 13
4.1
O
1 2
P Q R
Konstruksie: Verbind PO en OR ✓ konstruksie(radii, OP en OR)
In ∆POQ and ∆ ROQ
1) OQ = OQ..... gemeenskaplik
2) PO = OR ......radii ✓SR ia (PO = OR ..... radii)
̂1 = Q
3) Q ̂ 2 = 90°... gegee ✓S ia (Q̂1 = Q̂ 2 = 90°)
∴ ∆POQ ≡ ∆ROQ … 90°HS ✓SR
∴ PQ = RQ ✓ PQ =RQ
(5)
4.2.1
̂ 1 = 90°... lyn deur middel punt van ⨀ na middel van
A ✓SR
koord
̂1 + A
̂ = 180° − (O
B ̂1 ) .... som van hoeke van ∆ ✓ antwoord
= 50° (2)
7
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Wiskunde Vraestel 2
MEMORANDUM
GRAAD 11
4.2.2
Ĉ = 90°..... hoek in semi ⨀ ✓SR
̂ = 180° − (Ĉ + B
D ̂ )..... som van hoeke van ∆
= 40° ✓ antwoord
(2)
4.2.3
BD = √CD2 + BC 2 ......Pyth.
= √402 + 302
= 50 ✓ BD = 50
1
BO = BD .....radii
2
= 25 ✓ BO = 25
1
OA = CD...Midpt. St.
2
= 20 ✓ SR ie (OA = 20 .. Midpt.St)
AE = OE – OA
= 25 – 20
= 5 eenhede ✓ AE = 5
(4)
8
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Wiskunde Vraestel 2
MEMORANDUM
GRAAD 11
VRAAG 5 PUNTE : 10
5.1
̂L = ̂J1 = 𝑥........ hoeke teenoor gelyke sye ✓SR
̂ 1 = L̂ = x.......= koorde onderspan gelyke hoeke
N ✓S
✓R
(3)
5.2
̂ = Ĵ3 = 𝑦........... hoeke teenoor = sye
M ✓SR
̂1 = M
K ̂ = y........= koorde onderspan gelyke hoeke ✓SR
̂2 = K
Q ̂ 1 + Ĵ1 ... buite hoek van ∆ ✓SR
= x +y
̂2 = N
P ̂ 1 + ̂J3 ... buite hoek van ∆ ✓SR
=x+y
∴ ̂2 = P
Q ̂2 = x + y
(4)
5.3
̂4 = P
P ̂2 .... regoorstde. hoeke ̂4 = P
✓ S R vir P ̂2 OF
̂4 = Q
Q ̂ 2 ....regoorstde. hoeke ̂4 = Q
Q ̂2
but ̂2 = P
Q ̂2 ........bewys in Vr 5.2
∴ ̂4
̂4 = Q
P ̂4
̂4 = Q
✓P
∴ JQ = JP...... sye teenoor = hoeke OF gelykb. ∆ ✓R
(3)
9
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Wiskunde Vraestel 2
MEMORANDUM
GRAAD 11
VRAAG 6 PUNTE: 12
6.1
̂K 2 = ̂T1 ...... hoeke teenoor = sye OF gelyke radii ✓SR
̂T1 = Ĉ......... hoeke in selfde segment ̂ = Ĉ
✓T
∴ K̂ 2 = Ĉ ✓R
(3)
6.2
̂ ...... hoeke teenoor = sye OF gelyke radii
̂2 = A
T ✓SR
̂2 = T
P ̂... buite hoek van ∆
̂2 + A ✓SR
̂2
= 2T
̂1 = P
K ̂2 ........... hoeke in selfde segment ̂1 = P
✓K ̂2
̂ ̂2
K1 = 2T ✓R
(4)
6.3
̂4 = 2T
P ̂ ........ midpts. hoek = 2 x omtreks hoek ̂4 = 2T
✓P ̂
✓R
̂= T
T ̂1 + T
̂2
̂1 = Ĉ ....... hoeke in selfde segment
T
✓SR
1
̂2 =
T ̂ 1 ..... bewys in Vr.6.2
K
2 1
̂2 =
✓T ̂1
K
2
̂4 = 2(Ĉ + 1 K
P ̂ )
2 1 ̂4 = 2(Ĉ + 1 K
̂ )
✓ P
= 2Ĉ + K
̂1 2 1
(5)
TOTAAL : 100
10
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