Precalculus Examples

$1 + \cos (8 x) = 4 \cos (2 x)$

Step 1

The provided equation is not an identity.

$1 + \cos (8 x) = 4 \cos (2 x)$ is not an identity

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