Page 252 - Math Grade 11 (Basic)

PROEUS DARA

A-B
sin-- = 0 !l cosB = cosA = A = B
2
3 38 3
. 3B
. 3C
4
13 - . 3A + sm + sm = cos A cos cos C = 0 '1 e-ms A = 3 , B = 3 C=~
:rr;
:rr;
• n. sm
r:1
2 2 2 3
. SB
. SC
4
" . SA + sm + sm = cos SA cos SB cos SC = 0
a. sm
2 2 2
3
ttiQ12 A = ~ = 36° , A = :rr; = 108°
s
s
lt
B = ~ = 36° , B = ~:rr; = 108° , c = 5 , c = 3:rr; '1
3:rr; S:rc
3. n. 4 + 3kn $ El,;; 4 + 2k:rc
lt lt 7:rr; 3:rr; 7
?i. 0 ,;; El ,;; 6 , 2 < El < 6 , < El < 2:rc !.<> e n n e ?
"W. 0 ,;; ,;; 6 , 6 ,;; ,;; _:rr;
5. n. X = y = sinEJ = ScosEJ = tan8 = S = EJ = 78.7°

:rr; lt k:rr; lt k:rr; :rr; 2:rr;
5 .,x = k:rc.x = ± +2kn.x = + x = ± + .x = +k:rc x = ± +2k:rc
3 20 10 9 3 4 3
lt k:rr;
ill. x = ~ + k:rc tl.x = 2lm , x = ~ + 2k:rc u. x = 4 + (k E Z)
ll:rc S:rr;
lt $X< 2:rr; lZ:SX<

5. a = 1, b = -3, c = S

2. K =- ~

8. ?i. AB = I s -l] (ABfi = - ! [ 1 1J
l-11 1 6 11 s

B-I = H; ~] , B-JA-I =-HI\~]

2. fflSihtj M X

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