Trigonometry Examples

$\frac{\sin (4 x)}{\sin (x)} = 4 \cos (x) \cos (2 x)$

Step 1

The provided equation is an identity.

$\frac{\sin (4 x)}{\sin (x)} = 4 \cos (x) \cos (2 x)$ is an identity

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$