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Popular >

integral of (tan(x))/(sqrt(4+3sec(x)))

Solution

\int \frac{tan ( x )}{4 + 3 sec ( x )} d x

Solution

- \frac{1}{2} ln \frac{4 + 3 sec ( x )}{2} + 1 + \frac{1}{2} ln \frac{4 + 3 sec ( x )}{2} - 1 + C

Solution steps

\int \frac{tan ( x )}{4 + 3 sec ( x )} d x

Apply u-substitution

: \int \frac{1}{u 4 + 3 u} d u

= \int \frac{1}{u 4 + 3 u} d u

Apply u-substitution

: \int \frac{2}{v ^{2} - 4} d v

= \int \frac{2}{v ^{2} - 4} d v

Take the constant out:

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

= 2 \cdot \int \frac{1}{v ^{2} - 4} d v

Apply Integral Substitution

= 2 \cdot \int \frac{1}{2 ( w ^{2} - 1 )} d w

Take the constant out:

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

= 2 \cdot \frac{1}{2} \cdot \int \frac{1}{w ^{2} - 1} d w

Factor

w^{2} - 1 : - (- w^{2} + 1)

= 2 \cdot \frac{1}{2} \cdot \int \frac{1}{- ( - w ^{2} + 1 )} d w

Take the constant out:

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

= 2 \cdot \frac{1}{2} (- \int \frac{1}{- w ^{2} + 1} d w)

Use the common integral:

\int \frac{1}{- w ^{2} + 1} d w = \frac{ln ∣ w + 1 ∣}{2} - \frac{ln ∣ w - 1 ∣}{2}

= 2 \cdot \frac{1}{2} (- (\frac{ln ∣ w + 1 ∣}{2} - \frac{ln ∣ w - 1 ∣}{2}))

Substitute back

= 2 \cdot \frac{1}{2} - \frac{ln \frac{4 + 3 s e c ( x )}{2} + 1}{2} - \frac{ln \frac{4 + 3 s e c ( x )}{2} - 1}{2}

Simplify

2 \cdot \frac{1}{2} - \frac{ln \frac{4 + 3 s e c ( x )}{2} + 1}{2} - \frac{ln \frac{4 + 3 s e c ( x )}{2} - 1}{2} : - \frac{1}{2} ln \frac{4 + 3 sec ( x )}{2} + 1 + \frac{1}{2} ln \frac{4 + 3 sec ( x )}{2} - 1

= - \frac{1}{2} ln \frac{4 + 3 sec ( x )}{2} + 1 + \frac{1}{2} ln \frac{4 + 3 sec ( x )}{2} - 1

Add a constant to the solution

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

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