5. (07.01 MC) If the sin 60° = 3/2 then which statement is true? (6 points)

a) cos 120° = 0, because the cosine and sine are supplements

b) cos 30º = 0, because the cosine and sine are complements

c) COS 120º =
because the cosine and sine are supplements

d) cos 30º =
because the cosine and sine are complements