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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 get_translation_speed(self, distance_from_target):
 """Returns the translation speed for ``distance_from_target`` in units per radius. """

        return (distance_from_target *
                np.tan(self.fov_deg / 2.0 / 180.0 * np.pi))