Question

how do you prove??
sinx/1+cosx=1-cosx/sinx

Answer 1

@rl88 , still need help with this ?

Answer 2

First, we multiply numerator and denominator by 1-cos x
\(\large \dfrac{\sin x}{1+\cos x}=\dfrac{\sin x}{1+\cos x}\dfrac{1-\cos x}{1-\cos x}\)
now denominator is of the form \((a+b)(a-b)\) which simplifies to \(a^2-b^2\)
so, \((1-\cos x)(1+\cos x)=...?\)