Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2vY/ Esercizi: http://www.khanacademy.org/exercise/trigonometry_1 Traduzione in Italiano del video Using Trig Functions http://www.youtube.com/watch?feature=player_embedded&v=znR9tW4AiZI http://www.khanacademy.org/video/using-trig-functions?playlist=Trigonometry Help us caption & translate this video! http://amara.org/v/B2vY/