Precalculus Examples

$\sin (2 t) + \sin (t) = 0$

The provided equation is not an identity.

$\sin (2 t) + \sin (t) = 0$ is not an identity

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