Trigonometric Functions

\begin{align} \pi &= 3.1415926535897...\\ \\ 1\, rad &= \frac {180^{\circ}}{\pi} \approx 57.2957795131^{\circ}\\ \\ \alpha^{\circ}&=\alpha^{rad} \times \frac {180^{\circ}}{\pi}\\ \end{align}

radian (rad)	radian (rad)	degree of arc (°)
0 rad	0 rad	0°
π/6 rad	0.5235987756 rad	30°
π/4 rad	0.7853981634 rad	45°
π/3 rad	1.0471975512 rad	60°
π/2 rad	1.5707963268 rad	90°
2π/3 rad	2.0943951024 rad	120°
3π/4 rad	2.3561944902 rad	135°
5π/6 rad	2.6179938780 rad	150°
π rad	3.1415926536 rad	180°
7π/6 rad	3.6651914292 rad	210°
5π/4 rad	3.9269908170 rad	225°
4π/3 rad	4.1887902048 rad	240°
3π/2 rad	4.7123889804 rad	270°
5π/3 rad	5.2359877560 rad	300°
7π/4 rad	5.4977871438 rad	315°
11π/6 rad	5.7595865316 rad	330°
2π rad	6.2831853072 rad	360°

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