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Write the expression in terms of cosine.please help.
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Write the expression in terms of cosine.please help.

Write the expression in terms of cosine.please help.-example-1
User Tesia
by
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1 Answer

5 votes

Answer:

cos13°

Explanation:

Using the cofunction identity

sinx° = cos(90 - x)°

sin77° = cos(90 - 77)° = cos13°

User Alebian
by
5.1k points
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