3.584 \(\int \frac {1}{(1+\cosh (x))^2} \, dx\)

Optimal. Leaf size=25 \[ \frac {\sinh (x)}{3 (\cosh (x)+1)}+\frac {\sinh (x)}{3 (\cosh (x)+1)^2} \]

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Rubi [A]  time = 0.02, antiderivative size = 25, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, integrand size = 6, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.333, Rules used = {2650, 2648} \[ \frac {\sinh (x)}{3 (\cosh (x)+1)}+\frac {\sinh (x)}{3 (\cosh (x)+1)^2} \]

Antiderivative was successfully verified.

[In]

Int[(1 + Cosh[x])^(-2),x]

[Out]

Sinh[x]/(3*(1 + Cosh[x])^2) + Sinh[x]/(3*(1 + Cosh[x]))

Rule 2648

Int[((a_) + (b_.)*sin[(c_.) + (d_.)*(x_)])^(-1), x_Symbol] :> -Simp[Cos[c + d*x]/(d*(b + a*Sin[c + d*x])), x]
/; FreeQ[{a, b, c, d}, x] && EqQ[a^2 - b^2, 0]

Rule 2650

Int[((a_) + (b_.)*sin[(c_.) + (d_.)*(x_)])^(n_), x_Symbol] :> Simp[(b*Cos[c + d*x]*(a + b*Sin[c + d*x])^n)/(a*
d*(2*n + 1)), x] + Dist[(n + 1)/(a*(2*n + 1)), Int[(a + b*Sin[c + d*x])^(n + 1), x], x] /; FreeQ[{a, b, c, d},
x] && EqQ[a^2 - b^2, 0] && LtQ[n, -1] && IntegerQ[2*n]

Rubi steps

\begin {align*} \int \frac {1}{(1+\cosh (x))^2} \, dx &=\frac {\sinh (x)}{3 (1+\cosh (x))^2}+\frac {1}{3} \int \frac {1}{1+\cosh (x)} \, dx\\ &=\frac {\sinh (x)}{3 (1+\cosh (x))^2}+\frac {\sinh (x)}{3 (1+\cosh (x))}\\ \end {align*}

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Mathematica [A]  time = 0.01, size = 16, normalized size = 0.64 \[ \frac {\sinh (x) (\cosh (x)+2)}{3 (\cosh (x)+1)^2} \]

Antiderivative was successfully verified.

[In]

Integrate[(1 + Cosh[x])^(-2),x]

[Out]

((2 + Cosh[x])*Sinh[x])/(3*(1 + Cosh[x])^2)

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IntegrateAlgebraic [F]  time = 0.00, size = 0, normalized size = 0.00 \[ \int \frac {1}{(1+\cosh (x))^2} \, dx \]

Verification is Not applicable to the result.

[In]

IntegrateAlgebraic[(1 + Cosh[x])^(-2),x]

[Out]

Could not integrate

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fricas [B]  time = 1.13, size = 58, normalized size = 2.32 \[ -\frac {2 \, {\left (3 \, \cosh \relax (x) + 3 \, \sinh \relax (x) + 1\right )}}{3 \, {\left (\cosh \relax (x)^{3} + 3 \, {\left (\cosh \relax (x) + 1\right )} \sinh \relax (x)^{2} + \sinh \relax (x)^{3} + 3 \, \cosh \relax (x)^{2} + 3 \, {\left (\cosh \relax (x)^{2} + 2 \, \cosh \relax (x) + 1\right )} \sinh \relax (x) + 3 \, \cosh \relax (x) + 1\right )}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/(1+cosh(x))^2,x, algorithm="fricas")

[Out]

-2/3*(3*cosh(x) + 3*sinh(x) + 1)/(cosh(x)^3 + 3*(cosh(x) + 1)*sinh(x)^2 + sinh(x)^3 + 3*cosh(x)^2 + 3*(cosh(x)
^2 + 2*cosh(x) + 1)*sinh(x) + 3*cosh(x) + 1)

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giac [A]  time = 0.61, size = 14, normalized size = 0.56 \[ -\frac {2 \, {\left (3 \, e^{x} + 1\right )}}{3 \, {\left (e^{x} + 1\right )}^{3}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/(1+cosh(x))^2,x, algorithm="giac")

[Out]

-2/3*(3*e^x + 1)/(e^x + 1)^3

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maple [A]  time = 0.04, size = 15, normalized size = 0.60

method	result	size
risch	\(-\frac {2 \left (1+3 \,{\mathrm e}^{x}\right )}{3 \left (1+{\mathrm e}^{x}\right )^{3}}\)	\(15\)
default	\(-\frac {\left (\tanh ^{3}\left (\frac {x}{2}\right )\right )}{6}+\frac {\tanh \left (\frac {x}{2}\right )}{2}\)	\(16\)

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(1/(1+cosh(x))^2,x,method=_RETURNVERBOSE)

[Out]

-2/3*(1+3*exp(x))/(1+exp(x))^3

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maxima [B]  time = 0.43, size = 49, normalized size = 1.96 \[ \frac {2 \, e^{\left (-x\right )}}{3 \, e^{\left (-x\right )} + 3 \, e^{\left (-2 \, x\right )} + e^{\left (-3 \, x\right )} + 1} + \frac {2}{3 \, {\left (3 \, e^{\left (-x\right )} + 3 \, e^{\left (-2 \, x\right )} + e^{\left (-3 \, x\right )} + 1\right )}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/(1+cosh(x))^2,x, algorithm="maxima")

[Out]

2*e^(-x)/(3*e^(-x) + 3*e^(-2*x) + e^(-3*x) + 1) + 2/3/(3*e^(-x) + 3*e^(-2*x) + e^(-3*x) + 1)

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mupad [B]  time = 0.29, size = 14, normalized size = 0.56 \[ -\frac {2\,\left (3\,{\mathrm {e}}^x+1\right )}{3\,{\left ({\mathrm {e}}^x+1\right )}^3} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(1/(cosh(x) + 1)^2,x)

[Out]

-(2*(3*exp(x) + 1))/(3*(exp(x) + 1)^3)

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sympy [A]  time = 0.38, size = 14, normalized size = 0.56 \[ - \frac {\tanh ^{3}{\left (\frac {x}{2} \right )}}{6} + \frac {\tanh {\left (\frac {x}{2} \right )}}{2} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/(1+cosh(x))**2,x)

[Out]

-tanh(x/2)**3/6 + tanh(x/2)/2

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