import math
math.cos(math.radians(1))

math.sqrt(x)

point_1 = [0, 0, 0]
point_2 = [4, 4, 4]

point_3 = [-4, -4, -4]
distance = sqtr( ((0-4)(0-4)) + ((0-4)(0-4)) + ((0-4)*(0-4)) )