Question

Please help!!! If the sin 60° = square root of three over two, then which statement is true?

cos 30° = square root of three over two, because the cosine and sine are complements

cos 120° = square root of three over two, because the cosine and sine are supplements

cos 30° = 0, because the cosine and sine are complements

cos 1200° = 0, because the cosine and sine are supplements

Answer 1

A. You can look at your unit circle to see this or think of what a complement angle is.

Answer 2

Thank you so so much!!