Question

In trigonometry, cofunctions (sine and cosine, cosecant and secant, and tangent and cotangent) of __________________________ angles are congruent.

A)
complementary
B)
right
C)
straight
D)
supplementary

Answer 1

The correct answer to complete the given statement above would be option A. In trigonometry, cofunctions of complementary angles are congruent. Angles are considered complements if together they equal a right angle. For example, an angle of 60 degrees is a complement of an angle measuring 30 degrees.