Problem 22 of 7
Use sin(theta)=cos(90-theta) for 50 degrees.
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apply cofunction relationship.
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Angles must be complementary in degrees.
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Solution
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1. Find 90 degrees minus theta.
2. Rewrite sine as cosine of the complement.
3. Check degree arithmetic.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Cosine of the same angle unless theta is 45 degrees.