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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def rotateX(self, angle):
 """ Rotates the point around the X axis by the given angle in degrees. """

        rad = angle * math.pi / 180
        cosa = math.cos(rad)
        sina = math.sin(rad)
        y = self.y * cosa - self.z * sina
        z = self.y * sina + self.z * cosa
        return Point3D(self.x, y, z)