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OpenStudy (anonymous):
sin2x=_____ A. 2sinx+2cosx B. 1-2sin^2x C. 2sinx cosx D. 1/2 (cos(a-b)- cos(a+b))
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jimthompson5910 (jim_thompson5910):
sin(2x) = 2sin(x)cos(x) for all values of x
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