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OpenStudy (anonymous):
Write the expression as the sine, cosine, or tangent of an angle. sin 52° cos 13° - cos 52° sin 13°? sin 39° sin 65° cos 65° cos 39°
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OpenStudy (whpalmer4):
\[\sin(u-v) = \sin u\cos v -\cos u \sin v\]
OpenStudy (anonymous):
thank you
OpenStudy (whpalmer4):
what's your answer?
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