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Please help with this question

Please help with this question
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Please help with this question

Please help with this question-example-1
User Jeremy Allen
by
8.3k points

1 Answer

3 votes

Answer:

C

Explanation:

The difference formula for cosine is

cos(x - y) = cosxcosy + sinxsiny

Consider

cos75 = cos(120 - 45)°, then

cos(120 - 45)°

= cos120°cos45° + sin120°sin45° → C

User Heiko Rupp
by
7.9k points
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