def cos_with(self, direction):
""" Return the cosinus of self with direction """
cos = direction.dot(self) / (direction.magnitude() * self.magnitude())
return trignometric_clamp(cos)
def sin_with(self, direction):
""" Return the sinus of self with other """
# turn from direction to self
sin = direction.cross(self) / (direction.magnitude() * self.magnitude())
return trignometric_clamp(sin)
