Page 98 - Math Grade 11 (Basic)

PROEUS DARA

2
1- tan ~ 2tan a
2 2
cosa = sina = '1 ~tltt12J tan~ = t
2a ' za 2
l+tan l+tan
2 2
2
2t
1 - t
.
cosa = -- , sma = -- , tana = 2t
2
2
1+t l+t 1-

~'1
2
1- cos~ l- J3
. 2:rr . 2(1 :rr) 6 2 2-J3 r..n 51 ·n~>O
Slll 12 = Slll 2 X 6 = --- = -2- = -4- bW lliJ 12

. Jt ~
Slll12 = 2

. 3:rr J2
sm- r;:;
tan3; = tanG x 34n) = __ 4-=- 2 ,..;2 J2 + 1 '1
3
l + cos 4Jt = 1 f = 2 - J2 =

"'
2fl1'lf)tM 2 n. & ~ b ctu\' n.m nHl 1- COSX = tan~ '1
<I <I sinx 2
2 2
1- t 1 + /-1 + t
1---
1- cosx 1 + t 2 1+? 2l
ffltl tan~ = t ttl(fl~ = = -2i = t = tan~ '1
2 sinx 2t 2t 2
--2
1+? 1 + t

'in~ = J- cosa = J' + ~ = @_ = 2J5 co'~ = -J' +C<"a = J1-~ = - /! = - J5
2 2 2 ~5 5 ' 2 2 2 ~5 5

93