No solution?

[Ax]

Ive been trying to prove this identity for the past hour, and I cant seem to do it. Im starting to think its not possible. Heres the identity.
sin2x/1-cos2x = cotx
Can anyone give me some kind of hint. :frown:

[arildno]

First of all, learn to write your formulas PROPERLY! :grumpy:
There is a vast difference between sin(2x)/1-cos(2x) and sin(2x)/(1-cos(2x)).
The last one is the expression you should have used.

To derive the identity, recall the double angle formulas.

[vaishakh]

Substitute the formula 2cos^x - 1 for cos2x and 2sinxcosx for sin2x. then you just straight away ge the answer.