Trigonometry Examples

$\sec (- x) \cos (- x)$

Rewrite $\sec (- x) \cos (- x)$ in terms of sines and cosines.

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

Cancel the common factors.

$1$

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