# Trigonometry - Radian and degree measures of angles

1. 1 rad =$180^0 \over \pi$$\approx$$57^017^{\prime}45"$
2. $1^0={\pi \over180} rad \approx$ 0.017453 rad
3. $1^{\prime}={\pi \over 180.6} rad \approx$ 0.000291 rad
4. 1"=${\pi \over 180.3600} rad \approx 0.000005 rad$
5.  Angle (Degree) 0 30 45 60 90 180 270 360 Angle (radians) 0 $\pi \over6$ $\pi \over4$ $\pi \over3$ $\pi \over2$ $\pi$ $3\pi \over 2$ $2 \pi$