This does not seem to be an identity. It might be an equation in which you could solve for x; that is, find some x such that it is true If you want to try to prove it you could replace
cos^2(x) -1 by -(1-cos^2(x) ) in other words - sin^2(x) Similarly cot^2(x) = cos^2(x)/sin^2(x), but these do not seem to confirm any argument that this is an identity.
Comments
This does not seem to be an identity. It might be an equation in which you could solve for x; that is, find some x such that it is true If you want to try to prove it you could replace
cos^2(x) -1 by -(1-cos^2(x) ) in other words - sin^2(x) Similarly cot^2(x) = cos^2(x)/sin^2(x), but these do not seem to confirm any argument that this is an identity.