Question

8. (07.01 MC)If the sin 60º = 13, then which statement is true? =2cos 30º =V3, because the cosine and sine are complements523cos 120º =2because the cosine and sine are supplementscos 30º = 0, because the cosine and sine are complementscos 120º = 0, because the cosine and sine are supplements

Answer 1

Note that if the angles are complementary with each other, the sine and cosine are the same.

From the problem, sin 60 = √3/2, the complement of 60 degrees is 30,

so cos 30 is the same as sin 60.

The best answer is Choice A