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RSB [31]
3 years ago
12

Write the expression in terms of cosine.please help.

Mathematics
1 answer:
Aleks04 [339]3 years ago
4 0

Answer:

cos13°

Step-by-step explanation:

Using the cofunction identity

sinx° = cos(90 - x)°

sin77° = cos(90 - 77)° = cos13°

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