What is the integral of (sinh(2x))/(cosh(2x)+1) ?

The integral of (sinh(2x))/(cosh(2x)+1) is 1/2 ln|cosh(2x)+1|+C

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integral of (sinh(2x))/(cosh(2x)+1)

\int \frac{sinh ( 2 x )}{cosh ( 2 x ) + 1} d x

\frac{1}{2} ln ∣ cosh (2 x) + 1 ∣ + C

Solution steps

\int \frac{sinh ( 2 x )}{cosh ( 2 x ) + 1} d x

Apply u-substitution

: \int \frac{1}{2 u} d u

= \int \frac{1}{2 u} 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 \frac{1}{u} d u

Use the common integral:

\int \frac{1}{u} d u = ln (∣ u ∣)

= \frac{1}{2} ln ∣ u ∣

Substitute back

u = cosh (2 x) + 1

= \frac{1}{2} ln ∣ cosh (2 x) + 1 ∣

Add a constant to the solution

= \frac{1}{2} ln ∣ cosh (2 x) + 1 ∣ + C

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What is the integral of (sinh(2x))/(cosh(2x)+1) ?
The integral of (sinh(2x))/(cosh(2x)+1) is 1/2 ln|cosh(2x)+1|+C