Question

(1-cos^2x)(1-tan^2x) = sin^x-2sin^4x/1-sin^2x prove ls=rs

Answer 1

what's 1-cos^2x?
rewrite tanx as sinx/cosx
and it'll solve itself

Answer 2

no sin^2x

Answer 3

*so sin^2x

Answer 4

but it is not tanx, is it tan^2x