Question

(sinθ)/(1-cosθ)*(1+cosθ)/(1+cosθ)

Answer 1

what are you asking? it equals
\[\frac{\sin\theta}{1-\cos\theta}\]

Answer 2

I'm asking to multiply it.

Answer 3

you are multiplying it by one though.

Answer 4

oh ok thank you

Answer 5

assuming you formatted that correctly.

Answer 6

that's also \[\cot\left(\frac{\theta}{2}\right)\]