Trigonometry Examples

$\frac{\sin (s) + \sin (t)}{\cos (s) + \cos (t)} = \tan (\frac{s + t}{2})$

Step 1

The provided equation is an identity.

$\frac{\sin (s) + \sin (t)}{\cos (s) + \cos (t)} = \tan (\frac{s + t}{2})$ is an identity