Trigonometry Examples

$\sin (- a) + \sin (\frac{π}{2} - a) + \cos (a - \frac{π}{2}) = \cos (2 π - a)$

Step 1

The provided equation is an identity.

$\sin (- a) + \sin (\frac{π}{2} - a) + \cos (a - \frac{π}{2}) = \cos (2 π - a)$ is an identity