Precalculus Examples

$\sin (20) - \sin (40) - \sin (60) = - 4 \cos (x) \sin (20) \cos (30)$

Step 1

The provided equation is not an identity.

$\sin (20) - \sin (40) - \sin (60) = - 4 \cos (x) \sin (20) \cos (30)$ is not an identity