grafica con seno e coseno
traccia4
http://www.youtube.com/watch?v=gaznR_kjayk
traccia5
http://www.youtube.com/watch?v=0EJ4IGu4teQ
traccia6
http://www.youtube.com/watch?v=0EJ4IGu4teQ
traccia7
http://www.youtube.com/watch?v=W0k7SvHz8HE
traccia8
http://www.youtube.com/watch?v=fmY6owuYbcg
traccia9
http://www.youtube.com/watch?v=w6PN_EJ1E_Q