Respostas

2013-12-10T09:00:25-02:00
1a) sen 45 = \/2/2
1b) sen 450 = sen (450-360) = sen 90 = 1
1c) sen 0 = 0
1d) sen 1530 = .....1530:360 = 4 e sobram 90 --> sen 1530 = sen 90 = 1
1e) sen -90 = sen 360-90 = sen 270 = -1

4 4 4