Q. 134.3( 6 Votes )

∫ sin 4x cos 7x dx

Answer :

We know 2sinAcosB = sin(A + B) + sin(A – B)


sin4xcos7x =


We know sin( – θ) = – sinθ


sin( – 3x) = – sin3x


The above equation becomes




We know



+ c

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