Respostas

2013-11-05T17:25:01-02:00
A) a = 2, b = 0
r = \/(a²+b²)
r = \/(2²+0²)
r = \/4
r = 2
sen teta = b/r = 0/2 = 0
cos t = a/r = 2/2 = 1
t = 0º