Precalculus Examples

$\sin (a + b) \sin (a - b) = \sin^{2} (a) - \sin^{2} (b)$

Step 1

The provided equation is an identity.

$\sin (a + b) \sin (a - b) = \sin^{2} (a) - \sin^{2} (b)$ is an identity

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