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AravindGBest ResponseYou've already chosen the best response.0
because derivative of sinx (ie cos x ) is readily available!
 one year ago

wioBest ResponseYou've already chosen the best response.4
you don't even need to use that trig identity by the way.
 one year ago

wioBest ResponseYou've already chosen the best response.4
just let \(u=2x\) in the original integral, it'd work fine.
 one year ago

klimenkovBest ResponseYou've already chosen the best response.1
\(\int (65\cdot2\sin x \cos x)dx=\int6dx10\int\sin x \cos xdx\). Try to make a substitution \(t=\sin x,\quad dt=\cos x\). Good luck.
 one year ago

AravindGBest ResponseYou've already chosen the best response.0
@wio'smethod is the simplest :)
 one year ago

wioBest ResponseYou've already chosen the best response.4
\[ \int \sin(2x)dx = \int \sin(u)\frac{ du}{2} \]
 one year ago
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