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Back to Explain sine and cosine relationship — Problem 4 · 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 cos⁡(71°)≈0.326\cos(71\degree) \approx 0.326, find sin⁡(19°)\sin(19\degree) without a calculator. sin⁡(19°)=cos⁡(‾°)≈‾\sin(19\degree) = \cos(\underline{\hspace{5em}}\degree) \approx \underline{\hspace{5em}}.

complementary angle:
value: