Write the expression as the sine or cosine of an angle:
sin π/7 cos x + cos π/7 sin x
...
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
Answers: 2
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