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Mathematics, 20.04.2021 17:20 fili20

Write the expression as the sine or cosine of an angle: sin π/7 cos x + cos π/7 sin x

Hint: sin(A +- B) = sin A cos B +- cos A sin B
cos (A +- B) = cos A cos B -+ sin A sin B

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Write the expression as the sine or cosine of an angle: sin π/7 cos x + cos π/7 sin x

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