Trigonometry Examples

$2 \cos^{2} (2 x) - 1$

Step 1

Apply the cosine double-angle identity.

$\cos (2 (2 x))$

Step 2

Multiply $2$ by $2$ .

$\cos (4 x)$

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