Integration by parts - product of a polynomial and a trig function (xsin3xsin5x) factor formula

Integration by parts - product of a polynomial and a trig function (xsin3xsin5x) factor formula.
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[ThePhysicsMathsWizard]

Please & pls subscribe to this channel, i love mathematics and i love to share, i try out different problems throughout the day and i make videos about those that were the most interesting or tricky

[md.zafaralam]

Thanku sir, integration of periodic function with polynomial had made my from india