Back to Explain sine and cosine relationship — Problem 3 · Task Set 20

Exercises: Sine and Cosine of Complementary Angles

Grade 9·20 problems·~28 min·Common Core Math - HS Geometry·standard·hsg-srt-c-7
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Fluency Practice

1.

Given that sin(32°)0.53\sin(32\degree) \approx 0.53, use the complementary angle relationship to find cos(58°)\cos(58\degree) without a calculator. cos(58°)=sin(°)\cos(58\degree) = \sin(\underline{\hspace{5em}}\degree) \approx \underline{\hspace{5em}}.

complementary angle:
value: