Precalculus Examples

$(\sin^{4} (x) - \cos^{4} (x)) = \sin^{2} (x) - \cos^{2} (x)$

Step 1

The provided equation is not an identity.

$\sin^{4} (x) - \cos^{4} (x) = \sin^{2} (x) - \cos^{2} (x)$ is not an identity