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PROVINSIALE EKSAMEN
NOVEMBER 2021
GRAAD 11
NASIENRIGLYNE
WISKUNDE (VRAESTEL 2)
17 bladsye
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Mathematics Grade 11 P2 Gauteng November 2021 Memo (Afr)
Grade 11 Mathematics Paper 2 memorandum from the Gauteng November 2021 (Afrikaans), 17 pages. Read online or download the free PDF.
Mathematics Β· Grade 11 Β· Gauteng November Β· 2021. Memorandum, 17 pages. Read online or download the PDF.
- Subject
- Mathematics
- Grade
- Grade 11
- Document type
- Memorandum
- Year
- 2021
- Exam period
- Gauteng November
- Paper
- 2
- Curriculum
- CAPS
- Pages
- 17
- File size
- 1.3 MB
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WISKUNDE
NASIENRIGLYNE
(Vraestel 2) GRAAD 11
INSTRUKSIES EN INLIGTING:
A β Akkuraatheid
C.A. β Kontinue Akkuraatheid (volg op)
S β Bewering
R β Rede
S en R β Bewering en Rede
NOTA:
β’ Indien βn kandidaat βn vraag TWEE keer beantwoord het, merk slegs die EERSTE poging.
β’ Indien βn kandidaat βn antwoord doodgetrek het, en dit nie weer gedoen het nie, merk die
doodgetrekte antwoord.
β’ Deurlopende akkuraatheid moet op ALLE aspekte van die nasienriglyne toegepas word.
β’ Dit is onaanvaarbaar om waardes/antwoorde aan te neem om probleme op te los.
2
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WISKUNDE
NASIENRIGLYNE
(Vraestel 2) GRAAD 11
VRAAG 1
1.1 βπ
π=1 π₯π 408 β antwoord
Gemiddeld = = 19 = 21,47
π (1)
1.2 Standaardafwyking = 7,81 ββ antwoord (2)
1.3 Die limiete vir die een standaardafwyking is β interval
(π₯Μ
β 1π ; π₯Μ
+ 1π)
β 13 mense
= ( 21,47 β 7,81; 21,47 + 7,81) = (13,66 ; 29,28)
ο 13 mense lΓͺ binne 1 standaardafwyking van die
gemiddeld af. (2)
1.4 5 12 13 15 18 18 18 19 20 21 β Q1 = 18
21 22 23 23 26 29 33 35 37
IKVW = 26 β 18 β Q3 = 26
=8
β IKVW = 8 (3)
1.5 ββ houer / mond
β punt / snor
(3)
1.6 Daar is βn merkbare verskil tussen die laagste waarde (5) en β rede
die volgende laagste waarde (12) terwyl die verskille tussen
al die ander data waardes hoogstens binne 3 waardes is β 5 is βn uitskieter
ο 5 is βn uitskieter (2)
[13]
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WISKUNDE
NASIENRIGLYNE
(Vraestel 2) GRAAD 11
VRAAG 2
2.1 Lengte (cm) Aantal leerders Kumulatiewe β 89
(f) frekwensie
145 ο£ Γ οΌ 150 6 6 β 215
150 ο£ Γ οΌ 155 23 29 β 247
155 ο£ Γ οΌ 160 60 89
160 ο£ Γ οΌ 165 74 163
165 ο£ Γ οΌ 170 52 215
170 ο£ Γ οΌ 175 32 247
175 ο£ Γ οΌ 180 3 250
Totaal 250 (3)
2.2 Ogief wat die verspreiding van punte toon β Vorm
β grond op x- as
ο ο β plot die punte
ο
Kumulatiewe frekwensie
ο
ο
ο
ο Q1 Q2 Q3 (3)
ο
2.3 Q2 ο» 162 β
β
Q1 ο» 158 β
β
Q3 ο» 167
ο IKVW ο» 162 (4)
2.4 165 ο£ Γ οΌ 170 β antwoord (1)
2.5 35
= 14% β antwoord
250 (1)
2.6 ο³ = 6,43 ββ antwoord (2)
[14]
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WISKUNDE
NASIENRIGLYNE
(Vraestel 2) GRAAD 11
VRAAG 3
3.1 3+12
E( 2 ;
0+3
) β substitusie in
2 middelpuntformule
1 1
= (7 2 ; 1 2 ) β Antwoord (2)
3.2 MBC= 12β3
3β0 β substitusie in
gradiΓ«ntformule
1
=3 β Antwoord (2)
1
3.3 tan ΞΈ = mBC = β tan ΞΈ = mBC
3
1 β antwoord
ΞΈtan-1(3 ) = 18,43Μ (2)
3.4 1 1
MAD = MBC = 3 AD||BC, gelyke gradiΓ«nte β MAD = 3
6β0
MAB = 1β3 = β3
1 β MAB = β3
ο MAD Γ MAB = 3 Γ β3 = β1
οAD β₯ AB β MAD Γ MAB = β1 (3)
3.5 Inklinasie van nuwe lyn = 45Μ + 18,43Μ = 63,43Μ β 18,43Μ
ο tan 63,43Μ = 2 = mlyn β 63,43Μ
οy β 6 = 2(x β 1) βm=2
y = 2x + 4 β vergelyking (4)
[13]
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WISKUNDE
NASIENRIGLYNE
(Vraestel 2) GRAAD 11
VRAAG 4
4.1 MQP = MOS = 6 QP||OS, gelyke gradiΓ«nte β MQP = 6
y β 17 = 6(x + 3) β vergelyking
y = 6x + 35 (2)
4.2 6x + 35 = βx β opstel van vergelyking
7x = β35 βx=β5
x = β5
β koΓΆrdinate van Q
y = β (β5) β 5
οQ(β5;5) (3)
4.3 OQ2 = (β5 β 0)2 + (5 β 0)2 β substitusie in
afstandsformule
= 50
β5 2
OQ = 50 = 5 2 eenhede (2)
4.4 πππ = 6 β 80,54Β°
β΄ inklinasie van OS is β tanβ1 (4) = 80,54Β° β 135Β°
πππ = β1 β 54,46Β°
β΄ inklinasie van QO is 180Β° βtanβ1 (1) = 135Β°
πΌ= 135Β° β 80,54Β° β¦
= 54,46Β° (3)
4.5 QS2 = OS2 + OQ2 β 2OS.OQ.cos ο‘ β korrekte gebruik van
cosreΓ«l
= 148 + 50 β 2( 148 )( 50 .cos 54,46ο°)
β substitusie in formule
QS = 9,90 eenhede
β 9,90 (3)
[13]
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WISKUNDE
NASIENRIGLYNE
(Vraestel 2) GRAAD 11
VRAAG 5
5.1 5.1.1 sin 28Β° = cos 62Β° ββ Antwoord
=k (2)
5.1.2 cos 242Β° = βcos 62Β° ββ Antwoord
= βk (2)
5.2 sin π₯ cos π₯
= -tan x . cos x = cos π₯ Γ sin π₯ β tan x . cos x
βsin x
β βsin x
=1 sinπ₯
β cosπ₯
β1 (4)
5.3 cos 50Β° β cos π β(cos π + cos 50Β°) cos 50Β°βcos π
= cos π + sin 40Β° ββ sin 40 + cos π
sin 40 + cos π
cos 50Β° = sin 40Β° ββ β(cos ο± + cos 50Β°)
= β1
β antwoord (5)
5.4 = β22sin 20Β° . 23.βtan 45Β° β β22sin 20Β° . 23.βtan 45Β°
1 1
= β22.2 . 2β3 β β22.2 . 2β3
1
=β4 1
β 2
1
=2 (3)
5.5 5.5.1 sin2 x = 3 β antwoord
4
β3
sin x = Β± 2
(1)
5.5.2 Verwysingshoek = 60Β° βββ antwoorde
60Β°; 120Β°; 240Β° (3)
[20]
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WISKUNDE
NASIENRIGLYNE
(Vraestel 2) GRAAD 11
VRAAG 6
5 y
4
3
2
1
x
β90 β45 45 90 135 180
β1
β2
β3
β4
β5
6.1 f ( x) = tan x β 1 β asimptote
β afsnitte met asse
β vorm
g ( x) = cos 2 x β periode
β vorm met oop punt/kol
by x = β90ο°
(5)
6.2 6.2.1 cos 2 x + 1 = tan x β x = 45ο°
ο cos 2 x = tan x β 1
ο x = 45ο° (1)
6.2.2 2 cos 2 x = 1 β cos 2 x = 0
β oplossings
ο 2 cos 2 x β 1 = 0
ο cos 2 x = 0
ο x = ο±45ο° or x = 135ο° (2)
6.2.3 β90Β° < π₯ < β45Β° of 90Β° < π₯ < 135Β° οβ90Β° < π₯ < β45Β°
ο 90Β° < π₯ < 135Β° (2)
h( x) = cos 2( x β 30 ο― ) β h( x) = cos 2( x β 30 )
6.3 ο―
(1)
[11]
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WISKUNDE
NASIENRIGLYNE
(Vraestel 2) GRAAD 11
VRAAG 7
7.1
R
p
h q
180ο° β P
M P r Q
Konstruksie: Trek RM β₯ PQ of QP verleng ο konstruksie
RM = p sin Q
ο RM = p sin Q
CM = q sin (180 ο° β P) ο RM = q sin (180ο° β P)
= q sin P
ο p sin Q = q sin P
ο ο p sin Q = q sin P
Deel deur sinP.sinQ gee dan
ο Deel deur sinP.sinQ
p q
=
sin P sin Q
OF OF
R (qcos P; qsin P) y
ο R(qcosP; qsinP)
q p
ο konstruksie
ο RM = q sin P
M P r Q x
P is in standaardposisie soos in die diagram getoon. ο RM = p sin Q
Konstruksie: Trek RM β₯ PQ of QP verleng
RM = q sin P = p sin Q ο Deel deur sinP.sinQ
Deel deur sinP.sinQ dan kry ons
π π
= π ππ π (5)
π ππ π
9
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WISKUNDE
NASIENRIGLYNE
(Vraestel 2) GRAAD 11
7.2
L
1
h
I
d
J
K
7.2 7.2.1 In ο LKJ :
h
= sin y
LJ
οh = LJ sin y βββ (1) ο h substitusie in formule
In ο DAB :
LJ d
=
sin x sin L 1
maar LΛ1 = y β x
d sin x ο sinreΓ«l
ο LJ = β β β (2)
sin ( y β x)
ο
sub (2) in (1) : ο L1 = y β x
d sinx siny
h=
sin( y β x) ο LJ
ο substitusie (5)
7.2.2 70. sin 12ο°. sin 30ο° ο substitusie
h=
sin 18ο° ο antwoord
= 23, 55 m (2)
[12]
10
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WISKUNDE
NASIENRIGLYNE
(Vraestel 2) GRAAD 11
VRAAG 8
8.1 Volume van silinder:
V1 = ο°r2h
β Substitusie
= ο°(12) .(19)
2
β antwoord
= 2736 ο° m 3
Volume van hemisfeer (halwe sfeer):
1ο¦4 3οΆ
V2 = ο§ ο°r ο· 1
2ο¨3 οΈ β
2
Totale Volume = V1 + V2
β Substitusie
1 ο©ο¦ 4 3 οΆ 3οΉ β antwoord
= οͺ ο§ ο°r ο·(12) οΊ
2 ο«ο¨ 3 οΈ ο»
= 1152 ο°m3
Totale Volume = V1 + V2 β Totale Volume in π
= 2736ο° + 1152ο°
(5 uit 6 indien numeriese
= 3888ο° m 3 waarde van pi gebruik is ) (6)
11
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WISKUNDE
NASIENRIGLYNE
(Vraestel 2) GRAAD 11
8.2 Buiteoppervlak van silinder:
A1 = 2ο°r 2 + 2ο°rh β Substitusie
β antwoord
= 2ο° (12 ) + 2ο° ( 12 )( 19 )
2
= 2337 ,34 m 2 β Substitusie
Buiteoppervlak van hemisfeer (halwe sfeer):
β antwoord
1
A2 = (4ο°r 2 )
2
=
1
2
ο(4ο°r 2 )(12) 2 ο
= 452.39 m2
β Totale buiteoppervlak
β antwoord, korrek afgerond
Totale Buiteoppervlak = A1 + A2
= 2337,34 + 452.39
= 685.73 m2 ο» 686 m2 (6)
[12]
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WISKUNDE
NASIENRIGLYNE
(Vraestel 2) GRAAD 11
VRAAG 9
9.1 9.1.1 Die teenoorgestelde hoeke van βn sikliese vierhoek is ο antwoord
supplementΓͺr. (1)
9.1.2 Die hoek tussen die raaklyn en koord is gelyk aan die ο antwoord
hoek in die teengestelde segment. (1)
9.2
F
S
O
2
1 D
2
1
B A T
Konstrueer AF(middellyn) en FD (koord) β Konstruksie
ο β Bewering β Rede
D1 = 90 ο―
( ο in βn halwe sirkel )
ο
β Bewering en Rede
A1 = 90 ο― ( rad β₯ raaklyn )
ο ο
A2 = D2 (β π in dieselfde sirkelseg. ) β Bewering en Rede
ο ο ο ο
A1 + A2 = D1 + D2
ο ο
β Gevolgtrekking
ο BAS = D (6)
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WISKUNDE
NASIENRIGLYNE
(Vraestel 2) GRAAD 11
9.3 F G
1 2
1
2 H
3
1 70ΒΊ
E 2
1 2 3 30ΒΊ
P Q R
9.3.1 ο ο ο raaklyn β koordstelling
P Q E = H 3 = 70ο° (raaklyn β koordstell ing )
ο ο
οQ1 = 70ο° ο Q1 = 70ο° (2)
ο ο
9.3.2
E1 = 70ο° (verw. οe, EF / / QH ) ο E 1 = 70ο°
ο ο ο verw. οe =
G =180ο° β E1 (teenoorst. οe kvh EFGH ) ο ο
=180ο° β 70ο° ο G =180ο° β E1
ο οR
G =110ο° (4)
ο ο ο ο ο
9.3.3
Q2 =180ο° β (Q1 + Q 3 ) (οe op rtlynPQR ) ο 180ο° β (Q1 + Q3 )
=180ο° β (70ο° + 30ο°)
ο
= 80ο° ο Q2 = 80ο°
ο teenoorst οe van kvh
ο ο
E F H =180ο° β Q2 (teenoorst. οe kvh EFHQ ) ο
ο ο F1 =100ο°
F1 =180ο° β 80ο°
=100ο° (4)
[18]
14
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WISKUNDE
NASIENRIGLYNE
(Vraestel 2) GRAAD 11
VRAAG 10
10.1
10.1.1 οO1 = 2ο± (middelpunt ο = 2x omtrek ο ) οbeweringοrede (2)
10.1.2 οW = ο± ( οe in dieselfde sirkel segment) οbeweringοrede (2)
10.1.3 οZ = 90 ο― ( ο in βn halwe sirkel) οbewering & rede
οY2 = 90 β ο± (binne οe van Ε ο ) οbewering & rede (2)
10.2 WY 2 = WZ 2 + YZ 2 (Pythagoras stelling) ο bewering & rede
YZ = WU = UZ (gegee) ο bewering & rede
ο OW = OY = r (gegee) ο bewering & rede
4r 2 4r 4r 2
ο YZ = = YZ = OF
5 5 5
4r
YZ = ο
5 (4)
10.3 OW=OV= r =OU+OV ( radiusse ) οbeweringοrede
r = 3 + 4 (Pythagoras stelling)
2 2 2
r 2 = 32 + 4 2 ο
r = 5 cm r =5 cmο
οUV=5 β 2 οantwoord
=3 cm (2)
[12]
15
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WISKUNDE
NASIENRIGLYNE
(Vraestel 2) GRAAD 11
VRAAG 11
ο ο
11.1 ο bewering & rede
S = Q2 = x (verw. hoeke TQβPS)
ο ο
S = W1 = x (β π in dieselfde sirkel segment) ο bewering & rede
ο ο
S = Q4 = x ( ο tussen raaklyn en koord) ο bewering & rede
(3)
11.2 11.2.1 ο ο ο ο bewering & rede
R1 = S + Q3 (buite ο van ο )
ο ο ο
L3 = W1 + Q1 (buite ο van ο ) ο bewering & rede
ο ο
S = W1 = x ( ο e in dieselfde sirkel segment) ο bewering
ο ο ο gevolgtrekking
Q1 = Q3 ( = koorde onderspan = ο )
ο ο
ο R1 = L3 (4)
16
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WISKUNDE
NASIENRIGLYNE
(Vraestel 2) GRAAD 11
11.2.2 ο ο ο bewering ο rede
W1 = Q4 ( raaklyn koordstelling )
ο ο
Q1 = Q3 ( = koorde onderspan = ο ) ο bewering & rede
ο ο ο ο
ο Q4 + Q3 = W1 + Q1
ο bewering & rede
ο ο ο
netso L3 = W1 + Q1 (buite ο van ο )
ο ο bewering & rede
= R3 ( ooreenk. οe ,QT ||RS )
ο ο ο
ο R3 = Q4 + Q3
PRKQ is Ε koordevierkant.
(buite ο = teenoorst. binne ο )
Alternatiewelik:
ο ο ο ο
Q1 + Q3 = Q3 + S
OF
ο ο
W1 = Q4 ( raaklyn koordstelling)
ο ο
Q1 = Q3 ( = koorde onderspan = ο )
ο ο ο ο
(5)
ο Q4 + Q3 = W1 + Q1
[12]
TOTAAL: 150
17
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