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What value of θ makes cosθ = sin40° a true statement? A) 20° B) 40° C) 50° D) 90° HINT: Complementary angles
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What value of θ makes cosθ = sin40° a true statement?

A) 20°
B) 40°
C) 50°
D) 90°

HINT: Complementary angles

User Hsfzxjy
by
5.0k points

1 Answer

1 vote

Answer:

C) 50°

Explanation:


cos \: \theta = sin \: 40 \degree \\ cos \: \theta = cos(90 \degree - \: 40 \degree) \\ cos \: \theta = cos \: 50 \degree \\ \implies \: \theta = 50 \degree \\

User Pakage
by
4.8k points
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