Precalculus Examples

$\cot (x + y) = \frac{\cot (x) \cot (y) - 1}{\cot (y) - \cot (x)}$

Step 1

The provided equation is not an identity.

$\cot (x + y) = \frac{\cot (x) \cot (y) - 1}{\cot (y) - \cot (x)}$ is not an identity