Trigonometry Examples

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

Step 1

Apply the cosine double-angle identity.

$\cos (2 \frac{x}{2})$

Step 2

Cancel the common factor of $2$ .

Tap for more steps...

Step 2.1

Cancel the common factor.

$\cos (2 \frac{x}{2})$

Step 2.2

Rewrite the expression.

$\cos (x)$

$\cos (x)$

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