prove that (cos9+sin9)/(cos9-sin9)=cot36
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Hi Friend !!!
Here is ur answer !!!
(cos9+sin9)/(cos9-sin9)
= sin9 (cot9 + 1)/sin9(cot9-1)
= cot9+1/cot9-1
= cot(45-9)
= cot 36°
Hope it helps u :-)
Here is ur answer !!!
(cos9+sin9)/(cos9-sin9)
= sin9 (cot9 + 1)/sin9(cot9-1)
= cot9+1/cot9-1
= cot(45-9)
= cot 36°
Hope it helps u :-)
tejasri2:
r u satisfied
sss
ur class
class11
state
ts
oooo
any doubts ask me
in second step how can u multiply sin9.(cos9+1)
takes sin common
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