Trigonometry Examples

$\cot (- x) \cot (\frac{π}{2} - x)$

Since $\cot (- x)$ is an odd function, rewrite $\cot (- x)$ as $- \cot (x)$ .

$- \cot (x) \cot (\frac{π}{2} - x)$

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