Mathematics

$$\int {x\sin 3xdx} $$


SOLUTION
$$\int xsin3x dx=x(-cos3x)\frac{1}{3}-\int1\times(-cos3x)\frac{1}{3}dx $$

                      $$=\dfrac {-xcos3x}{3}+\dfrac {sin3x}{9} +c$$
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Subjective Medium Published on 17th 09, 2020
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