Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2v4/ Esercizi: http://www.khanacademy.org/exercise/graphs_of_sine_and_cosine Traduzione in Italiano del video Graphing trig functions http://www.youtube.com/watch?feature=player_embedded&v=vHYI93UV5Kg http://www.khanacademy.org/video/graphing-trig-functions?playlist=Trigonometry