What is the integral of 6xsin(5x) ?

The integral of 6xsin(5x) is 6(-1/5 xcos(5x)+1/25 sin(5x))+C

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integral of 6xsin(5x)

\int 6 x sin (5 x) d x

6 (- \frac{1}{5} x cos (5 x) + \frac{1}{25} sin (5 x)) + C

Solution steps

\int 6 x sin (5 x) d x

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= 6 \cdot \int x sin (5 x) d x

Apply Integration By Parts

: - \frac{1}{5} x cos (5 x) - \int - \frac{1}{5} cos (5 x) d x

= 6 (- \frac{1}{5} x cos (5 x) - \int - \frac{1}{5} cos (5 x) d x)

\int - \frac{1}{5} cos (5 x) d x = - \frac{1}{25} sin (5 x)

= 6 (- \frac{1}{5} x cos (5 x) - (- \frac{1}{25} sin (5 x)))

Simplify

= 6 (- \frac{1}{5} x cos (5 x) + \frac{1}{25} sin (5 x))

Add a constant to the solution

= 6 (- \frac{1}{5} x cos (5 x) + \frac{1}{25} sin (5 x)) + C

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\int sin (5 y) d y

What is the integral of 6xsin(5x) ?
The integral of 6xsin(5x) is 6(-1/5 xcos(5x)+1/25 sin(5x))+C