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VOORBEREIDENDE EKSAMEN
2018
NASIENRIGLYNE
TEGNIESE WISKUNDE (VRAESTEL 2)
19 bladsye
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Technical Mathematics Grade 12 P2 Gauteng Mock 2018 Memo
Grade 12 Technical Mathematics Paper 2 memorandum from the Gauteng Mock Exam 2018 (Afrikaans), 19 pages. Read online or download the free PDF.
Technical Mathematics · Grade 12 · Gauteng Mock Exam · 2018 · Afrikaans. Memorandum, 19 pages. Read online or download the PDF.
- Subject
- Technical Mathematics
- Grade
- Grade 12
- Language
- Afrikaans
- Document type
- Memorandum
- Year
- 2018
- Exam period
- Gauteng Mock Exam
- Paper
- 2
- Curriculum
- CAPS
- Pages
- 19
- File size
- 556.0 KB
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GAUTENGSE DEPARTEMENT VAN ONDERWYS
VOORBEREIDENDE EKSAMEN
TEGNIESE WISKUNDE
(Vraestel 2)
NASIENRIGLYNE
VRAAG 1
1.1 Middelpunt van BC = ( ) x = – 1
y = – 1
(2)
=M(–1 ; – 1)
1.2 = OF =
– –
= = substitusie in die regte formule
= =
antwoord
= = (2)
1.3 y = mx + c
7 = +c substitusie (3 ; 7) of (– 3 ; 4)
substitusie van =
c= c =
(3)
y= x+
2
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OF
substitusie (3 ; 7) of (– 3 ; 4)
substitusie van =
c =
y= x+ (3)
1.4.1
substitusie
Verwysingshoek = 68,20
Verwysingshoek = 68,20
(2)
1.4.2
(2)
1.5 KC2 = (x 2 – x 1 )2 + (y2 – y1 )2 gebruik van afstandsformule
17 = (–3 – e)2 +(4 – 2e -1)2 substitusie van die regte
waardes in die regte formule
17 = 9 + 6e + e2 + 9 – 12e + 4e2
standaardvorm
5e2 – 6e + 1 = 0
(5e – 1)(e – 1) = 0
beide e – waardes
or e = 1 beide f – waardes
f = 2(1) +1 = 3
(5)
f = 2( ) +1 =
[16]
3
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VRAAG 2
2.1
2.1.1 d=5 d = 5
(1)
2.1.2 Radius R
(1)
2.1.3 = =
= Produk van loodregte lyne se =
gradiënte = -1
y = mx + c
–4= – +c substitusie van gradiënt
substitusie van B(– 3 ; – 4)
–
c= (4)
Verlangde vergelyking is: y = –
3x + 4y + 25 = 0
OF
OF
4
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Gebruik die formule: x.x 1 + y.y1 = r2 regte formule
x 1 = – 3 en y1 = – 4
(–3)x + (–4)y = 25 substitusie van B(– 3 ; – 4)
–3x – 4y = 25 substitusie van = 25
3x + 4y + 25 = 0. vereenvoudiging (4)
2.1.4 CA OA Raaklyn Radius
xc = 5 identifiseer dat x = 5 by C
Substitusie van x = 5 in 3x + 4y + 25 = 0
m.a.w.: 3(5) + 4y + 25 = 0 substitusie van x c = 5 in
BC
4y + 40 = 0
y = –10
y = –10
C(5 ; – 10)
(3)
2.2 =1 vergelyking in
standaardvorm
x-afsnitte: (– 3 ; 0) ; (3 ; 0) x –afsnitte
y-afsnitte: (0 ; – 2) ; ( 0 ; 2) y-afsnitte
(3)
y
2
x
0
-3 3
-2
[12]
5
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VRAAG 3
3.1.1 √ tan =–1
– –
tan = tan =
√ √
diagram met
terminale been in die
regte kwadrant
Gebruik Pythagoras: r = 2 r = 2
sin = sin = (4)
3.1.2 √ substitusie
( )
antwoord
cos2 =
OF OF
cos2 = 1 – sin2 identiteit
= 1 – ( )2
antwoord
= (2)
3.1.3 Gebruik sin =
Verwysingshoek
Verwysingshoek = 30o
= 30o
= 150o
= 150o
(2)
OF
–
OF
Gebruik tan =
√
Verwysingshoek = 30o Verwysingshoek
= 30o
= 150o
= 150o
(2)
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3.2 cot (x – y) = cot ( – ) substitusie
= cot( )
=
antwoord
= 0,27 (3)
[11]
VRAAG 4
4.1
sin x
= – cos x
– cos x
=
–
Teller
= Noemer
=1 (6)
4.2 RK =
=
–
–
–
=
= –
–
= ( – )– –
= –
= LK
LK = RK
: –
(5)
7
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4.3 2 cos 2x = √
cos 2x = √ cos 2x = √
Verwysingshoek: 2x = 30o 2x = 30o
Kwadrant I: Kwadrant IV:
x = 15o
x = 15o (4)
[15]
VRAAG 5
5.1 Ko-Binne hoeke; QV RW R
(1)
5.2 ̂ = 90 – 30
o o
= 60o S
In QVR:
̂ Binne
S/R (2)
5.3 In PQR:
√
√
8
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In QRV:
gebruik van die sin-reël
korrekte substitusie in die
sin-reël
√
(4)
√
5.4 Oppervlakte van QRV =
= √ √ √ √
= 739,382 m2 739,382
Oppervlakte van RVW = √
√
VW =
√ √
= √ √
= 270,63 m2 270,63
Oppervlakte van QVWR = 1010,01 m2 1010,01 (7)
[14]
9
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VRAAG 6
6.1 Sien die onderstaande skets:
Vir f(x)
x –afsnitte 0o ; 180o ; 360o
vorm
assimptote by 90o & 270o
Vir g(x)
y –afsnit (0 ; – 2)
Draaipunte by (90o ; – 1) en (270o ; – 3)
vorm
(6)
f
f
f
g
6.2 1 1 (1)
6.3 180o 180o
(1)
o o o o
6.4 90 < x < 270 90 < x < 270 (2)
[10]
10
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VRAAG 7
7.1 ….. is loodreg op die koord. loodreg op die
koord (2)
7.2 In die onderstaande diagram is O die middelpunt van die sirkel waarvan die radius
10 cm is. Die lengte van die koord BC is 16 cm en OD BC. M is die middelpunt
van koord CE.
7.2.1 BD = 8 cm Loodlyn uit midpt. na koord SR (2)
2 2 2
7.2.2 In BOD: OB = OD + BD Pythagoras S/R
(10)2 = OD2 + (8)2 substitusie
OD = 6 cm OD = 6 cm (3)
7.2.3 OM EC Midpt. ʘ ; Midpt. koord SR
m.a.w.: ̂ C = 90o
̂ C = 90o Loodlyn uit midpt. na koord
̂C + ̂C = 180o S
R
MODC is ʼn koordevierhoek teenoorst. e van
(4)
vierhoek is suppl.
[11]
11
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VRAAG 8
8.1 Raaklyn Radius R
(1)
8.2 ̂ S = 40 o
S
(1)
8.3 ̂ = 90o in ½ SR
(2)
8.4 In TWR:
50o + ̂R + ̂ R = 180o Binne S/R
̂R = 90o e op reguit lyn S/R
50o + 90o + ̂ R = 180o
̂ R = 40o (2)
8.5 ̂ = ̂ S = 40o e in dies. ʘ segm. SR
(2)
8.6 ̂ ̂ ̂ Buite R
= 90o + ̂ S
S
Maar: ̂ ̂ e in dies. ʘ segm.
̂ ̂
S
= 90o + ̂ (4)
[12]
12
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VRAAG 9
9.1
P
( x + 2) cm
x cm
M S
3 cm
2 cm
Q R
In : MS // QR
lyn || een sy van S/R
substitusie
=
3x = 2x + 4
vereenvoudiging
antwoord
(4)
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9.2 A
1
B
3 F
C
1
D
G
E M
9.2.1a = lyn || een sy van S
antwoord
(2)
= 4:1
9.2.1b lyn || een sy van S
antwoord
= 3: 1 (2)
9.2.2 In AEM: DG // EM
lyn || een sy van S
DE = antwoord
(2)
[10]
14
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VRAAG 10
10 L
K
15
20
30
M
40
N
10.1 In en :
||| Sye van (3)
eweredig
10.2 Omdat ||| van 10.1 hierbo
̂ ̂ S
LK MN Verwissellende R
(2)
10.3 ||| S
Substitusie
MO = 20 – KO
10(20 – KO) = 40 (KO)
200 – 10.KO = 40.KO
200 = 50 KO
KO = 4 eenhede antwoord
(4)
[9]
15
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VRAAG 11
C
6 cm
A 15 cm 15 cm B
D
O
E
11.1.1 4h2 – 4dh + x 2 = 0
4(6)2 – 4d(6) + (30)2 = 0 substitusie in die
regte formule
144 – 24d + 900 = 0
24d = 1044
d = 43,5cm d = 43,5
Maar: d = DOE + 6
DOE = 37,5 cm DOE = 37,5 cm
(3)
11.1.2 In AOB:
AB2 = AO2 + OB2 – 2(AO)(BO)cos ̂B substitusie in die
cos-reël
(30)2 = (21,75)2 + (21,75)2 – 2(21,75)(21,75). cos ̂B
̂ 0,04875….. vereenvoudiging
antwoord (3)
̂ B = 87,21o
11.1.3 Middelpuntshoek = 87,21o = 1,52 radiale 87,21o = 1,52
radiale
Booglengte = s = r
substitusie in die
s = (21,75).(1,52) regte formule
s = 33,06 cm
antwoord (3)
16
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11.2.1 Hoeksnelheid = 2
= substitusie in die
regte formule
= radiale/sekonde
antwoord (2)
11.2.2 Deursnee = 0,24 m d = 0,24 m
Omtreksnelheid = v =
= substitusie in die
regte formule
= 5,04 m/s
antwoord (3)
[14]
QUESTION 12
12.1.1 l2 = r2 + h2 Pythagoras S
l=√ antwoord
(2)
12.1.2 = ………..(1)
Substitusie van l = √ in (1) hierbo
√ ) = substitusie van
l=√
√ =
√ =
r2 + h 2 = 4h 2
2 2
r2 + h 2 = 4h 2
r = 3h (3)
12.1.3 Volume van ʼn kegel = substitusie van r2 = 3h 2
=
antwoord
Volume van ʼn kegel
(2)
17
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12.1.4a Volume silinder – Volume kegel = 54
π – = 54 opstel van die
vergelyking
)h – = 54
2h3 = 54
h3 = 27 vereenvoudiging
h= 3
(2)
2 2
12.1.4b r = 3(3) substitusie
r= √ antwoord
(2)
12.2
y1 y2 y3 y4 y5 y6 y7 y8 y9 y10 y11
430 793 1167 1475 1409 1431 1365 1205 870 529 347
y1 y2 y3 y4 y5 y6 y7 y8 y9 y10 y11
12.2.1 AT = a[ + y2 + y3 + y4 + y5 +….+y10 ] substitusie in die
regte formule
= 110[388,5 +
793+1167+1475+1409+1431+1365+1205+870+529]
= 110[388,5 + 10244]
antwoord
= 116 9575 km2
OF OF
18
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AT = a[m1 + m2 + m3 +…..+ m10 ], waar
a = 110 ; en
m1 = ;
m2 = = 980; 3-5 mid-ordinate reg
m3 = = 1321;
OF
m4 = al 10 mid-ordinate reg
m5 = = 1420
m6 = = 1398
m7 = = 1285
m8 = = 1037,5
m9 = = 699,5
m10 = = 438
AT = 110[10 632,5] = 1 169 575 km 2
antwoord
(3)
12.2.2 Oppervlakte van die ingekleurde gebied =
(1475 ) – 1 169 575 (1475 )
= 452 925 km2 antwoord
(2)
[16]
TOTAAL: 150
19
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