Precalculus Examples

$\sin^{2} (x) = \cos^{2} (x) - 1$

The provided equation is not an identity.

$\sin^{2} (x) = \cos^{2} (x) - 1$ is not an identity

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$