Example Question - special angles

Trigonometric Values of Special Angles

\begin{align*} \sin(45^\circ) &= \frac{\sqrt{2}}{2},\\ \cos(45^\circ) &= \frac{\sqrt{2}}{2},\\ \tan(45^\circ) &= \frac{\sin(45^\circ)}{\cos(45^\circ)} = \frac{\frac{\sqrt{2}}{2}}{\frac{\sqrt{2}}{2}} = 1. \end{align*}