Method rotate

numericals.py:107–109

(self, sinb: float, cosb: float)

    return self.rotate(sinb, cosb)

  def rotate(self, sinb: float, cosb: float) -> Point:
    x, y = self.x, self.y
    return Point(x * cosb - y * sinb, x * sinb + y * cosb)

  def flip(self) -> Point:
    return Point(-self.x, self.y)