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16-05-2019
Mathematics

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Write the expression in terms of cosine.please help.

Write the expression in terms of cosineplease help class=

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jimrgrant1 jimrgrant1

16-05-2019

Answer:

cos13°

Step-by-step explanation:

Using the cofunction identity

sinx° = cos(90 - x)°

sin77° = cos(90 - 77)° = cos13°

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