From radians to degrees

360° ——— 2π radians
x° ———- 1 radian
x = 360/2π = 180/π = 57.295° (so, 1 radian is 57.295°)
Therefore, when we have an angle given in radians and we'd like to have it in degrees, we just have to multiply that number of radians by 180/π.