3.182 \(\int \frac {\tanh (x)}{a+b \cosh (x)} \, dx\)

Optimal. Leaf size=20 \[ \frac {\log (\cosh (x))}{a}-\frac {\log (a+b \cosh (x))}{a} \]

[Out]

ln(cosh(x))/a-ln(a+b*cosh(x))/a

________________________________________________________________________________________

Rubi [A]  time = 0.04, antiderivative size = 20, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 4, integrand size = 11, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.364, Rules used = {2721, 36, 29, 31} \[ \frac {\log (\cosh (x))}{a}-\frac {\log (a+b \cosh (x))}{a} \]

Antiderivative was successfully verified.

[In]

Int[Tanh[x]/(a + b*Cosh[x]),x]

[Out]

Log[Cosh[x]]/a - Log[a + b*Cosh[x]]/a

Rule 29

Int[(x_)^(-1), x_Symbol] :> Simp[Log[x], x]

Rule 31

Int[((a_) + (b_.)*(x_))^(-1), x_Symbol] :> Simp[Log[RemoveContent[a + b*x, x]]/b, x] /; FreeQ[{a, b}, x]

Rule 36

Int[1/(((a_.) + (b_.)*(x_))*((c_.) + (d_.)*(x_))), x_Symbol] :> Dist[b/(b*c - a*d), Int[1/(a + b*x), x], x] -
Dist[d/(b*c - a*d), Int[1/(c + d*x), x], x] /; FreeQ[{a, b, c, d}, x] && NeQ[b*c - a*d, 0]

Rule 2721

Int[((a_) + (b_.)*sin[(e_.) + (f_.)*(x_)])^(m_.)*tan[(e_.) + (f_.)*(x_)]^(p_.), x_Symbol] :> Dist[1/f, Subst[I
nt[(x^p*(a + x)^m)/(b^2 - x^2)^((p + 1)/2), x], x, b*Sin[e + f*x]], x] /; FreeQ[{a, b, e, f, m}, x] && NeQ[a^2
- b^2, 0] && IntegerQ[(p + 1)/2]

Rubi steps

\begin {align*} \int \frac {\tanh (x)}{a+b \cosh (x)} \, dx &=\operatorname {Subst}\left (\int \frac {1}{x (a+x)} \, dx,x,b \cosh (x)\right )\\ &=\frac {\operatorname {Subst}\left (\int \frac {1}{x} \, dx,x,b \cosh (x)\right )}{a}-\frac {\operatorname {Subst}\left (\int \frac {1}{a+x} \, dx,x,b \cosh (x)\right )}{a}\\ &=\frac {\log (\cosh (x))}{a}-\frac {\log (a+b \cosh (x))}{a}\\ \end {align*}

________________________________________________________________________________________

Mathematica [A]  time = 0.01, size = 20, normalized size = 1.00 \[ \frac {\log (\cosh (x))}{a}-\frac {\log (a+b \cosh (x))}{a} \]

Antiderivative was successfully verified.

[In]

Integrate[Tanh[x]/(a + b*Cosh[x]),x]

[Out]

Log[Cosh[x]]/a - Log[a + b*Cosh[x]]/a

________________________________________________________________________________________

fricas [A]  time = 1.43, size = 40, normalized size = 2.00 \[ -\frac {\log \left (\frac {2 \, {\left (b \cosh \relax (x) + a\right )}}{\cosh \relax (x) - \sinh \relax (x)}\right ) - \log \left (\frac {2 \, \cosh \relax (x)}{\cosh \relax (x) - \sinh \relax (x)}\right )}{a} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(tanh(x)/(a+b*cosh(x)),x, algorithm="fricas")

[Out]

-(log(2*(b*cosh(x) + a)/(cosh(x) - sinh(x))) - log(2*cosh(x)/(cosh(x) - sinh(x))))/a

________________________________________________________________________________________

giac [A]  time = 0.12, size = 33, normalized size = 1.65 \[ \frac {\log \left (e^{\left (-x\right )} + e^{x}\right )}{a} - \frac {\log \left ({\left | b {\left (e^{\left (-x\right )} + e^{x}\right )} + 2 \, a \right |}\right )}{a} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(tanh(x)/(a+b*cosh(x)),x, algorithm="giac")

[Out]

log(e^(-x) + e^x)/a - log(abs(b*(e^(-x) + e^x) + 2*a))/a

________________________________________________________________________________________

maple [A]  time = 0.07, size = 21, normalized size = 1.05 \[ \frac {\ln \left (\cosh \relax (x )\right )}{a}-\frac {\ln \left (a +b \cosh \relax (x )\right )}{a} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(tanh(x)/(a+b*cosh(x)),x)

[Out]

ln(cosh(x))/a-ln(a+b*cosh(x))/a

________________________________________________________________________________________

maxima [A]  time = 0.45, size = 33, normalized size = 1.65 \[ -\frac {\log \left (2 \, a e^{\left (-x\right )} + b e^{\left (-2 \, x\right )} + b\right )}{a} + \frac {\log \left (e^{\left (-2 \, x\right )} + 1\right )}{a} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(tanh(x)/(a+b*cosh(x)),x, algorithm="maxima")

[Out]

-log(2*a*e^(-x) + b*e^(-2*x) + b)/a + log(e^(-2*x) + 1)/a

________________________________________________________________________________________

mupad [B]  time = 0.43, size = 201, normalized size = 10.05 \[ \frac {2\,\mathrm {atan}\left (\frac {a\,\sqrt {-a^2}+b\,{\mathrm {e}}^x\,\sqrt {-a^2}+2\,a\,{\mathrm {e}}^{2\,x}\,\sqrt {-a^2}+b\,{\mathrm {e}}^{3\,x}\,\sqrt {-a^2}}{a^2}\right )}{\sqrt {-a^2}}-\frac {2\,\mathrm {atan}\left (\left (4\,a^4\,b\,\sqrt {-a^2}-4\,a^2\,b^3\,\sqrt {-a^2}\right )\,\left ({\mathrm {e}}^x\,\left (\frac {1}{16\,b^2\,{\left (a^2-b^2\right )}^2}-\frac {{\left (a^2-2\,b^2\right )}^2}{16\,a^4\,b^2\,{\left (a^2-b^2\right )}^2}\right )+\frac {1}{8\,a\,b\,{\left (a^2-b^2\right )}^2}+\frac {a^2-2\,b^2}{8\,a^3\,b\,{\left (a^2-b^2\right )}^2}\right )\right )}{\sqrt {-a^2}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(tanh(x)/(a + b*cosh(x)),x)

[Out]

(2*atan((a*(-a^2)^(1/2) + b*exp(x)*(-a^2)^(1/2) + 2*a*exp(2*x)*(-a^2)^(1/2) + b*exp(3*x)*(-a^2)^(1/2))/a^2))/(
-a^2)^(1/2) - (2*atan((4*a^4*b*(-a^2)^(1/2) - 4*a^2*b^3*(-a^2)^(1/2))*(exp(x)*(1/(16*b^2*(a^2 - b^2)^2) - (a^2
- 2*b^2)^2/(16*a^4*b^2*(a^2 - b^2)^2)) + 1/(8*a*b*(a^2 - b^2)^2) + (a^2 - 2*b^2)/(8*a^3*b*(a^2 - b^2)^2))))/(
-a^2)^(1/2)

________________________________________________________________________________________

sympy [F]  time = 0.00, size = 0, normalized size = 0.00 \[ \int \frac {\tanh {\relax (x )}}{a + b \cosh {\relax (x )}}\, dx \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(tanh(x)/(a+b*cosh(x)),x)

[Out]

Integral(tanh(x)/(a + b*cosh(x)), x)

________________________________________________________________________________________