Special Trigonometric Values

Below are the key degree-radian conversions and special sine, cosine, and tangent values that all trigonometry students should know.

$$\begin{array}{ccccc}\text{degrees}& \text{radians}& \text{sin}& \text{cos}& \text{tan}\\ 0^{\circ }& 0& 0& 1& 0\\ 30^{\circ }& \frac{\pi }{6}& \frac{1}{2}& \frac{\sqrt{3}}{2}& \frac{\sqrt{3}}{3}\\ 45^{\circ }& \frac{\pi }{4}& \frac{\sqrt{2}}{2}& \frac{\sqrt{2}}{2}& 1\\ 60^{\circ }& \frac{\pi }{3}& \frac{\sqrt{3}}{2}& \frac{1}{2}& \sqrt{3}\\ 90^{\circ }& \frac{\pi }{2}& 1& 0& \text{undef.}\end{array}$$