Trigonometry Examples

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

Step 1

The provided equation is an identity.

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

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