Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2ve/ Traduzione in Italiano del video Law of cosines http://www.youtube.com/watch?feature=player_embedded&v=pGaDcOMdw48 http://www.khanacademy.org/video/law-of-cosines?playlist=Trigonometry Help us caption & translate this video! http://amara.org/v/B2ve/