Radian don't give simple numbers for simple angles. For example the right angle, in degrees it is 90deg, in radian it is 1.5707963267948966... Better using tau-

Radian don't give simple numbers for simple angles. For example the right angle, in degrees it is 90deg, in radian it is 1.5707963267948966... Better using tau-radian, it is 0.25tau (right angle is 0.25 of full circle).