Respostas

2014-04-18T13:34:31-03:00
Sen3π/2= -1
sen 0= 0
sen π/2 =1

y=-1+0*1= -1

cos π/2= 0
sen π/4 =√2/2
cos²  π= (-1)*(-1)= 1

0*√2/2+1= 1