How would i solve this equation in Radians:
cosx + sinx = 0
cos and sin are equal in magnitude at 45 degrees from the axes in all quadrants
however they are opposite in sign only in quadrants 2 and 4
so
pi-pi4/ = 3pi/4 or 135 deg
2 pi - pi/4 = 7 pi/4 = 315 deg