Question

Prove the identity 2sin^-1x=cos^-1(1-2x^2)

Answer 1

\[2\sin^{-1}(x)=\cos^{-1}(1-2x)\]
Right? I just wanted to post it more clearly.

Answer 2

Forgot the 2x^2 on your inverse cos equation

Answer 3

differentiate both functions

Answer 4

Yes that is the proper function, I've derived both sides, but i can't seem to get through the simplificatins