What is the integral of xsin((x^2)/4) ?

The integral of xsin((x^2)/4) is -2cos((x^2)/4)+C

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integral of xsin((x^2)/4)

\int x sin (\frac{x ^{2}}{4}) d x

- 2 cos (\frac{x ^{2}}{4}) + C

Solution steps

\int x sin (\frac{x ^{2}}{4}) d x

Apply u-substitution

= \int \frac{sin ( \frac{u}{4} )}{2} d u

Take the constant out:

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

= \frac{1}{2} \cdot \int sin (\frac{u}{4}) d u

Apply u-substitution

= \frac{1}{2} \cdot \int sin (v) \cdot 4 d v

Take the constant out:

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

= \frac{1}{2} \cdot 4 \cdot \int sin (v) d v

Use the common integral:

\int sin (v) d v = - cos (v)

= \frac{1}{2} \cdot 4 (- cos (v))

Substitute back

= \frac{1}{2} \cdot 4 (- cos (\frac{x ^{2}}{4}))

Simplify

\frac{1}{2} \cdot 4 (- cos (\frac{x ^{2}}{4})) : - 2 cos (\frac{x ^{2}}{4})

= - 2 cos (\frac{x ^{2}}{4})

Add a constant to the solution

= - 2 cos (\frac{x ^{2}}{4}) + C

What is the integral of xsin((x^2)/4) ?
The integral of xsin((x^2)/4) is -2cos((x^2)/4)+C