1.

Integrate the following functions x sin 3x

Answer»

Solution :`INT X SIN 3x dx`
=`x(-COS(3x)/3) - int 1xx cos(3x)/3 dx`
=`-(x cos 3x)/3 + 1/3 ((sin(3x)/3) +c`
=`-1/3 x cos 3x +1/9 sin 3x +c`


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