Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2v3/ Esercizi: http://www.khanacademy.org/exercise/graphs_of_sine_and_cosine Traduzione in Italiano del video Graphs of trig functions http://www.youtube.com/watch?feature=player_embedded&v=QmxMPPkZpME http://www.khanacademy.org/video/graphs-of-trig-functions?playlist=Trigonometry Help us caption & translate this video! http://amara.org/v/B2v3/