Page 101 - Math Grade 11 (Basic)

PROEUS DARA

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=flS~~ =-==================

l. t?l'l:flS sina = ~ (o<a<~) , sm =- (~<B<Jt) '1
. B 1
3
?H1Jl Sl sin (a + B) , cos(a- ~) , tan(a-B) 2 il cot (a - ~) '1
2 . 8
2. t~'l:flS cos8 = - , (~<8<Jt) '1 ?lrt.fl Sl cos28 , sm , sin38 '1
3 2

8 2t 1 -? 2t
3. G?l'l:flS t = tan (t ;e ±I) , sin8 = , cos 8 = , tan 8 =
2 2
1 + l + t 1-
ffl1Hu'i§ffH1 2cos28-cos8+2 = 0 ?lrt.flSl tan~ ttlru- ~<8<~ '1
2 2 2

.
Sw cosa +sin~
5. t~'l:flS sma +cos~= 5 """"
4
~ rul Sl sin (a + ~) 2 il tan (a + !3) '1
6. rm:.J m m hl'tl fil n ~ il t L m'tl :
u l.ll ""
n. cot(a ±b) = cotacotb + 1
cotb ± cota

2. tan(a +b)- tana- tanh tan a tanbtan (a+ b) '1

4 4
sin a + 2 sin a cos a - cos a
~. = cos2a
tan2a -1
3 3
cos a- cos3a + sin a+ sin3a
lli. = 3
cos a
7. tuty run r; SJl'tl~ il tLffl'tl
1.J
n. sin4x- 4sin3x + 6sin2x- 4sinx

2 2
2. cos (a+~)+cos (a-~)-cos2acos2~

sin a+ sin3a + sin5a
~.
cos a+ cos3a + cos5a
lli. sina + sin3a + sin5a + sin7a
cos a+ cos3a + cos5a + cos7a

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