Algebra Examples

$1 + \cos (2 a) = \frac{2}{1 + \tan^{2} (a)}$

Step 1

The provided equation is an identity.

$1 + \cos (2 a) = \frac{2}{1 + \tan^{2} (a)}$ is an identity

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