Algebra Examples

$1 + \cos (18 x) = 2 \cos^{2} (9 x)$

Step 1

The provided equation is an identity.

$1 + \cos (18 x) = 2 \cos^{2} (9 x)$ is an identity

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