abigailturner1202 abigailturner1202

18-04-2021
Mathematics

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find the expression as the cosine of an angle
cos pi/4 cos pi/9 - sin pi/4 sin pi/9

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StrugglingBean StrugglingBean

23-04-2021

Answer: cos(13pi/36)

Step-by-step explanation: just did the assignment

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