What is the integral of (x^5+1)cos(x^6+6x) ?

The integral of (x^5+1)cos(x^6+6x) is 1/6 sin(x^6+6x)+C

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integral of (x^5+1)cos(x^6+6x)

\int (x^{5} + 1) cos (x^{6} + 6 x) d x

\frac{1}{6} sin (x^{6} + 6 x) + C

Solution steps

\int (x^{5} + 1) cos (x^{6} + 6 x) d x

Apply u-substitution

= \int \frac{cos ( u )}{6} d u

Take the constant out:

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

= \frac{1}{6} \cdot \int cos (u) d u

Use the common integral:

\int cos (u) d u = sin (u)

= \frac{1}{6} sin (u)

Substitute back

u = x^{6} + 6 x

= \frac{1}{6} sin (x^{6} + 6 x)

Add a constant to the solution

= \frac{1}{6} sin (x^{6} + 6 x) + C

What is the integral of (x^5+1)cos(x^6+6x) ?
The integral of (x^5+1)cos(x^6+6x) is 1/6 sin(x^6+6x)+C