Trigonometry Examples

$\cos (0 - x)$

Step 1

Subtract $x$ from $0$ .

$\cos (- x)$

Step 2

Since $\cos (- x)$ is an even function, rewrite $\cos (- x)$ as $\cos (x)$ .

$\cos (x)$

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