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OpenStudy (anonymous):
Write the expression as either the sine, cosine, or tangent of a single angle. sin 57° cos 13° - cos 57° sin 13°
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OpenStudy (raden):
hint : sin(a)cos(b) - cos(a)sin(b) = sin(a-b)
OpenStudy (anonymous):
57-13=sin(44)? ok thanks!
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