What is the integral of (3x-2)tan(3x^2-4x+11) ?

The integral of (3x-2)tan(3x^2-4x+11) is -1/2 ln|cos(3x^2-4x+11)|+C

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integral of (3x-2)tan(3x^2-4x+11)

\int (3 x - 2) tan (3 x^{2} - 4 x + 11) d x

- \frac{1}{2} ln cos (3 x^{2} - 4 x + 11) + C

Solution steps

\int (3 x - 2) tan (3 x^{2} - 4 x + 11) d x

Apply u-substitution

= \int \frac{tan ( u )}{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 tan (u) d u

Rewrite using trig identities

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

Apply u-substitution

= \frac{1}{2} \cdot \int - \frac{1}{v} d v

Take the constant out:

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

= \frac{1}{2} (- \int \frac{1}{v} d v)

Use the common integral:

\int \frac{1}{v} d v = ln (∣ v ∣)

= \frac{1}{2} (- ln ∣ v ∣)

Substitute back

= \frac{1}{2} (- ln cos (3 x^{2} - 4 x + 11))

Simplify

= - \frac{1}{2} ln cos (3 x^{2} - 4 x + 11)

Add a constant to the solution

= - \frac{1}{2} ln cos (3 x^{2} - 4 x + 11) + C

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What is the integral of (3x-2)tan(3x^2-4x+11) ?
The integral of (3x-2)tan(3x^2-4x+11) is -1/2 ln|cos(3x^2-4x+11)|+C