What is the integral of 3sin(ln(x)) ?

The integral of 3sin(ln(x)) is 3(1/2 xsin(ln(x))-1/2 xcos(ln(x)))+C

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integral of 3sin(ln(x))

\int 3 sin (ln (x)) d x

3 (\frac{1}{2} x sin (ln (x)) - \frac{1}{2} x cos (ln (x))) + C

Solution steps

\int 3 sin (ln (x)) d x

Take the constant out:

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

= 3 \cdot \int sin (ln (x)) d x

Apply Integration By Parts

: x sin (ln (x)) - \int cos (ln (x)) d x

= 3 (x sin (ln (x)) - \int cos (ln (x)) d x)

\int cos (ln (x)) d x = \frac{1}{2} x sin (ln (x)) + \frac{1}{2} x cos (ln (x))

= 3 (x sin (ln (x)) - (\frac{1}{2} x sin (ln (x)) + \frac{1}{2} x cos (ln (x))))

Expand

x sin (ln (x)) - (\frac{1}{2} x sin (ln (x)) + \frac{1}{2} x cos (ln (x))) : \frac{1}{2} x sin (ln (x)) - \frac{1}{2} x cos (ln (x))

= 3 (\frac{1}{2} x sin (ln (x)) - \frac{1}{2} x cos (ln (x)))

Add a constant to the solution

= 3 (\frac{1}{2} x sin (ln (x)) - \frac{1}{2} x cos (ln (x))) + C

\int_{0}^{x} e^{t} d t

y^{- 1} + y^{- 2}

\int_{- 1}^{0} x^{2} - 1 d x

x \to - 9 + lim (\frac{1}{x + 9})

y = 6 x^{2} - x^{3} (1.5)

What is the integral of 3sin(ln(x)) ?
The integral of 3sin(ln(x)) is 3(1/2 xsin(ln(x))-1/2 xcos(ln(x)))+C