Trigonometry Examples

$\sin (\frac{5 π}{8})$

The angle $\frac{5 π}{8}$ does not split into two angles where the values of the six trigonometric functions are known. The sum and difference formulas cannot be used.

No solution

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