Question

Convert ${45}^{\circ }$ to radians.

Answer 1

As we know ${180}^{\circ }$ is equal to $\pi$ rad, hence,
$1^{\circ }=\frac{\pi }{{180}^{\circ }}rad$
$\Rightarrow {45}^{\circ }={45}^{\circ }\times \frac{\pi }{{180}^{\circ }}=\frac{\pi }{4}rad$.