indefinite-integration

Question: The value of $\int_{{}}^{{}}{x\sin kx\ dx}$is

1) $\frac{\sin kx}{k}+c$

2) $\frac{\cos kx}{k}+c$

3) $\frac{\sin x}{k}+c$

4) $-\frac{x\,\cos kx}{k}+\frac{\sin kx}{{{k}^{2}}}+c$

Solution:

Explanation: No Explanation

Integration by parts

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