2) Dê o seno, cosseno e tangente dos ângulos acima.

a) sen7π/6 = b) sen15π/4 = c) sen480º =

cos7π/6 = cos15π/4 = cos480º =

tg 7π/6 = tg 15π/4 = tg 480º =

d) sen(-5π/3) = e) sen7π/2 = f) sen14π =

cos(-5π/3) = cos7π/2 = cos14π =

tg (-5π/3) = tg 7π/2 = tg 14π =