Page 94 - Math Grade 11 (Basic)

PROEUS DARA

"' 0
mtt:Jd2M -B n:nru [3 n!Wu'l:32 cos(a-B) f:t:JQI2
u "' u G1
l
cos[n (-0)] = cosacos(-B)+sinnsin(-B) il~jcos(a+B) = cosacosB-sinasinBj (2)

1. 2 tHl.fl m sin (a + (3) 8 b sin (a - (3)

ffi'l:3illQrul:~tir:Llf]) tt:JQI2 sin(cx+0) = cos[~-(a+B)] = cos[G-cx) --0]

ffi'l:3fi.J'I:3~ (I) sin(a+0) = cos(~-cx)cosP+sin(~-cx)sinp

~fl cos(~-a.) = sinn 8b sin(~ a.) =coso: '1

sin( a.+ f3) = sinacos0 + sin(:kosa (3)

"'
~fnfJUM 1

tf:l(fl2 sin( a 0) = sin[ a+ (-(3)]

sin(n- (3) = sinacos(-(3) + sin(-B)cosa r:i:llru cos(-(3) = cosB 8b sin(-(3) = -sinf3
sin(a-(3) = sinacosB-sinf3cosa I (4)

"'
. Jt
. (Jt Jt)
. Jt
. Jt
~£ntntnn 2 sm = sm = sm cos Jt sm cos Jt J2 J3 - 1 J2 J6-J2
x
=
x
=
12 4 6 4 6 6 4 2 2 2 2 4
sin9°cos39°- cos9°sin39°
3Jt 5Jt . 3Jt . 5Jt
cos cos + sm sm
7 28 7 28
sin9°cos39°- cos9°sin39° _ sin(9°- 39°) sin( -30°) _
= J2'i
3Jt 5Jt . 3Jt . 5Jt - ( 12Jt 5Jt) Jt 2
cos cos - + sm - sm- cos - - - cos-
2 8 7 2 8 ' 28 28 4
0 ' 0
ruunntu 2 utn mm sina + cosa = J2sin(a + ~) '1
u ~ ~ 4
t:Hgru sina+cosa = J2(~sina+~cosa) = J2(sinacos~+sin~cosa) = J2sin(a+~) '1
, sin ~ , cos ~
f:1 rul2l sin 105 o , cos 105 o 1 1
u tn m m sin (a - f3) + sin ( f3 8) + sin ( 8 - a) = 0 '1
~ ~ cosacosf3 cosBcos8 cos8cosa

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