Trigonometry Examples

$\frac{1 - \tan (x)}{1 + \tan (x)} = \frac{1 - \sin (2 x)}{\cos (2 x)}$

Step 1

The provided equation is an identity.

$\frac{1 - \tan (x)}{1 + \tan (x)} = \frac{1 - \sin (2 x)}{\cos (2 x)}$ is an identity