Page 105 - Math Grade 11 (Basic)

PROEUS DARA

nb~bhUihmn.n~u~ft:Hli~SG~ 0 sb A
"' I IJ <>
0 1'\:1 Ill:» -7 -7 e:J
thurultH'HlHStHtflru (OA, ON) = a UHli
1 ..
u
cos a = OP = a ( !:1um2lb nil ) <J A'
u u £1
X
Yjlb~ QJ b9J~ a = OP = cos( -a) tf:l ru -a
I"'.) 0 --7 ---7 M
tllHjlM~S~ (OA, OM) <J &t'!QlS :

d5 aEt[-1, I] M@nu cosx =a

!:lmsg x = 2kn (k E Z) <J
u

!:lmsg X= n+2kJt (kEZ)
II

- ttl a E ] -1, 1[ ~8 a t~Yruti&'it!:lru cosa =a= cosx <J
lJ

Ill::» '\:1 QJ C» c6
utYrutSMYffll cosx = cosa ~SlUt'! x=a+2kn '15 x=-a+2kJt (kEZ)
~ ~

OQ) U C» U 0 0 C» t:»
2. ntYllinrul:YrtH!:lru~SnMSM!:lui?il lli8Unrt~Y91brtHMi?il 'i5Gijji?fl&Sl8
S I II 1 I U c; 1 I ""c; ~<I <t
I
&tiffiut!:ll8LMruM@m~ cosu(x) = cosv(x) ~ u(x) = ± v(x) + 2kn , (kEZ) t!:lru u(x)
Q d'\:1 •
sb v(x) tllHStiYStS X <j
I

4
~ x- ~ = ~- 3x + 2kn '15 x- ~ = (~ - 3x) + 2kn , k E Z
4 2 "' 4

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