Question

Ada yg bisa no 11 pakai cara ?

Answer 1

Sin pangkat 2 x / 1 - cos x = 1 - cos x × 1 + cos x / 1 - cos x
= a. 1 + cos x

Answer 2

sin²x/1-cosx=
=(1-cos²x)/(1-cosx)
=(1-cosx)*(1+cosx)/(1-cosx) 
=1+cosx

*ingat! a^2 - b^2 = (a+b)(a-b)

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