Question

Which pair of trigonometric values is equivalent v

A. cos 113º, cos 67°
B. sin 71º, sin 19
C. cos 389, sin 38°
D.cos 65º, sin 25°

Answer 1

D. Cos 65°,Sin 25°

Explanation:

Since they are a pair of complementary trigonometric ratio. Complementary angles add up to 90° and so does 65° and 25°.

Answer B. did not qualify since they are from the same trigonometric ratio i.e sin.