Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2uy/ Traduzione in Italiano del video Polar Coordinates 2 http://www.youtube.com/watch?feature=player_embedded&v=zGpbSGj_vfE http://www.khanacademy.org/video/polar-coordinates-2?topic=trigonometry Help us caption & translate this video! http://amara.org/v/B2uy/