Question

Find each angle in radians without using a calculator need some help with it, thanks!

Answer 1

$\begin{gathered} \frac{\pi}{4}radians\text{ is a special angle such Tan}\frac{\pi}{4}radians\text{ =1} \\ so\text{ }\theta\text{ is equal to }\frac{\pi}{4\text{ }}radians \end{gathered}$