from math import sin, cos, pi print(sin(pi/2)) # 1.0 print(cos(pi/2)) # 6.123233995736766e-17 The actual methods by which sin and cos are calculated are rather complicated (I’ll return to this in ...

This post is about how sin and cos are calculated in the c language standard math library on a typical Linux system. Because Python floats are really c doubles, what I write here will apply to Python ...