Answer: The answer is (a) cos 30° = square root of three over two, because the cosine and sine are complements
Step-by-step explanation: Given that -
we are to select the correct statement from the given four options.
We know that sine and cosine functions are supplement of each other. So, we have
Thus, the correct option is (a) cos 30° = square root of three over two, because the cosine and sine are complements.