Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2ux/ Traduzione in Italiano del video Polar Coordinates 1 http://www.youtube.com/watch?feature=player_embedded&v=jexMSlSDubM http://www.khanacademy.org/video/polar-coordinates-1?topic=trigonometry Help us caption & translate this video! http://amara.org/v/B2ux/