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
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.
