#17 Precalculus questions

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nqnzsneal18

Mathematics

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Explanation & Answer

Tanx=(sinx)/(cosx)  ... sin^2(x)/tanx=sin^2(x)*cosx/sinx  the sines cancel and your left with sinx*cosx ... sin2x=2cosxsinx.... 1/2*2sinxcosx=1/2sin2x


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