Problem 69 of 7
Rewrite sine expression sin(3y degrees) as cosine of its complement.
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transform trig notation.
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Complement must sum with original angle to 90 degrees.
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Your answer is equivalent to the expected form.
Solution
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1. Identify the angle inside sine.
2. Subtract it from 90 degrees.
3. Write cosine of that complement.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Cosine of 180 minus angle.