So I'm given a problem in which I have to prove an identity. It goes:
2csc2x=csc^2xtanx
I did the problem myself and could only get to 2csc2x=2\(sin2x)= 2\(2sinxcosx). I had no idea how to get further with the problem so I looked at the answer in the back of my pre-calculus book. It said...