Question

prove that sinx/1-cosx = tanx/2​

Answer 1

Answer:

Here is answer to your question.  

We know that Sin2x=2SinxCosx

and Cos2x=2Cos^2x-1

i.e. 1+Cos2x=2Cos^x

Now use x as x/2

We get Sinx/(1+Coosx)

=(2Sinx/2*Cosx/2)/(2Cos^x/2)

=Sinx/2/Cosx/2

=tanx/2

=R.H.S

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