def rotateX(self, angle):
rad = angle * pi / <NUM_LIT><EOL>cosa = cos(rad)<EOL>sina = sin(rad)<EOL>y = self.y * cosa - self.z * sina<EOL>z = self.y * sina + self.z * cosa<EOL>return Point3D(self.x, y, z)<EOL>
Rotates the point around the X axis by the given angle in degrees.