Problem 78 of 7
Rewrite cosine expression cos(45 degrees) as sine 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 cosine.
2. Subtract it from 90 degrees.
3. Write sine of that complement.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Sine of the same angle except at 45 degrees.