Fill in the blank so that the functions given are equal. cos _____, sin 10°
A) 10°
B) 80°
C) -10°
D) 100°

Name: Fill in the blank so that the functions given are equal. cos _____, sin 10° A) 10° B) 80° C) -10° D) 100°
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Question

Quizplus · Accepted Answer

The correct answer is B) 80° because the cosine and sine functions are cofunctions of each other, meaning cos(θ) = sin(90° - θ). Therefore, to make cos(θ) equal to sin(10°), θ must be 80°.

Fill in the Blank So That the Functions Given Are