Integrand size = 13, antiderivative size = 56 \[ \int \frac {\coth ^2(x)}{a+b \sinh (x)} \, dx=\frac {b \text {arctanh}(\cosh (x))}{a^2}-\frac {2 \sqrt {a^2+b^2} \text {arctanh}\left (\frac {b-a \tanh \left (\frac {x}{2}\right )}{\sqrt {a^2+b^2}}\right )}{a^2}-\frac {\coth (x)}{a} \]
b*arctanh(cosh(x))/a^2-coth(x)/a-2*arctanh((b-a*tanh(1/2*x))/(a^2+b^2)^(1/ 2))*(a^2+b^2)^(1/2)/a^2
Time = 0.24 (sec) , antiderivative size = 89, normalized size of antiderivative = 1.59 \[ \int \frac {\coth ^2(x)}{a+b \sinh (x)} \, dx=-\frac {4 \sqrt {-a^2-b^2} \arctan \left (\frac {b-a \tanh \left (\frac {x}{2}\right )}{\sqrt {-a^2-b^2}}\right )+a \coth \left (\frac {x}{2}\right )-2 b \log \left (\cosh \left (\frac {x}{2}\right )\right )+2 b \log \left (\sinh \left (\frac {x}{2}\right )\right )+a \tanh \left (\frac {x}{2}\right )}{2 a^2} \]
-1/2*(4*Sqrt[-a^2 - b^2]*ArcTan[(b - a*Tanh[x/2])/Sqrt[-a^2 - b^2]] + a*Co th[x/2] - 2*b*Log[Cosh[x/2]] + 2*b*Log[Sinh[x/2]] + a*Tanh[x/2])/a^2
Result contains complex when optimal does not.
Time = 0.59 (sec) , antiderivative size = 74, normalized size of antiderivative = 1.32, number of steps used = 18, number of rules used = 17, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 1.308, Rules used = {3042, 25, 3202, 25, 3042, 25, 3535, 3042, 26, 3480, 26, 3042, 26, 3139, 1083, 219, 4257}
Below are the steps used by Rubi to obtain the solution. The rule number used for the transformation is given above next to the arrow. The rules definitions used are listed below.
| \(\displaystyle \int \frac {\coth ^2(x)}{a+b \sinh (x)} \, dx\) |
| \(\Big \downarrow \) 3042 |
| \(\displaystyle \int -\frac {1}{\tan (i x)^2 (a-i b \sin (i x))}dx\) |
| \(\Big \downarrow \) 25 |
| \(\displaystyle -\int \frac {1}{(a-i b \sin (i x)) \tan (i x)^2}dx\) |
| \(\Big \downarrow \) 3202 |
| \(\displaystyle -\int -\frac {\text {csch}^2(x) \left (\sinh ^2(x)+1\right )}{a+b \sinh (x)}dx\) |
| \(\Big \downarrow \) 25 |
| \(\displaystyle \int \frac {\left (\sinh ^2(x)+1\right ) \text {csch}^2(x)}{a+b \sinh (x)}dx\) |
| \(\Big \downarrow \) 3042 |
| \(\displaystyle \int -\frac {1-\sin (i x)^2}{\sin (i x)^2 (a-i b \sin (i x))}dx\) |
| \(\Big \downarrow \) 25 |
| \(\displaystyle -\int \frac {1-\sin (i x)^2}{\sin (i x)^2 (a-i b \sin (i x))}dx\) |
| \(\Big \downarrow \) 3535 |
| \(\displaystyle -\frac {\int \frac {\text {csch}(x) (b-a \sinh (x))}{a+b \sinh (x)}dx}{a}-\frac {\coth (x)}{a}\) |
| \(\Big \downarrow \) 3042 |
| \(\displaystyle -\frac {\coth (x)}{a}-\frac {\int \frac {i (b+i a \sin (i x))}{\sin (i x) (a-i b \sin (i x))}dx}{a}\) |
| \(\Big \downarrow \) 26 |
| \(\displaystyle -\frac {\coth (x)}{a}-\frac {i \int \frac {b+i a \sin (i x)}{\sin (i x) (a-i b \sin (i x))}dx}{a}\) |
| \(\Big \downarrow \) 3480 |
| \(\displaystyle -\frac {\coth (x)}{a}-\frac {i \left (\frac {i \left (a^2+b^2\right ) \int \frac {1}{a+b \sinh (x)}dx}{a}+\frac {b \int -i \text {csch}(x)dx}{a}\right )}{a}\) |
| \(\Big \downarrow \) 26 |
| \(\displaystyle -\frac {\coth (x)}{a}-\frac {i \left (\frac {i \left (a^2+b^2\right ) \int \frac {1}{a+b \sinh (x)}dx}{a}-\frac {i b \int \text {csch}(x)dx}{a}\right )}{a}\) |
| \(\Big \downarrow \) 3042 |
| \(\displaystyle -\frac {\coth (x)}{a}-\frac {i \left (\frac {i \left (a^2+b^2\right ) \int \frac {1}{a-i b \sin (i x)}dx}{a}-\frac {i b \int i \csc (i x)dx}{a}\right )}{a}\) |
| \(\Big \downarrow \) 26 |
| \(\displaystyle -\frac {\coth (x)}{a}-\frac {i \left (\frac {i \left (a^2+b^2\right ) \int \frac {1}{a-i b \sin (i x)}dx}{a}+\frac {b \int \csc (i x)dx}{a}\right )}{a}\) |
| \(\Big \downarrow \) 3139 |
| \(\displaystyle -\frac {\coth (x)}{a}-\frac {i \left (\frac {2 i \left (a^2+b^2\right ) \int \frac {1}{-a \tanh ^2\left (\frac {x}{2}\right )+2 b \tanh \left (\frac {x}{2}\right )+a}d\tanh \left (\frac {x}{2}\right )}{a}+\frac {b \int \csc (i x)dx}{a}\right )}{a}\) |
| \(\Big \downarrow \) 1083 |
| \(\displaystyle -\frac {\coth (x)}{a}-\frac {i \left (\frac {b \int \csc (i x)dx}{a}-\frac {4 i \left (a^2+b^2\right ) \int \frac {1}{4 \left (a^2+b^2\right )-\left (2 b-2 a \tanh \left (\frac {x}{2}\right )\right )^2}d\left (2 b-2 a \tanh \left (\frac {x}{2}\right )\right )}{a}\right )}{a}\) |
| \(\Big \downarrow \) 219 |
| \(\displaystyle -\frac {\coth (x)}{a}-\frac {i \left (\frac {b \int \csc (i x)dx}{a}-\frac {2 i \sqrt {a^2+b^2} \text {arctanh}\left (\frac {2 b-2 a \tanh \left (\frac {x}{2}\right )}{2 \sqrt {a^2+b^2}}\right )}{a}\right )}{a}\) |
| \(\Big \downarrow \) 4257 |
| \(\displaystyle -\frac {\coth (x)}{a}-\frac {i \left (\frac {i b \text {arctanh}(\cosh (x))}{a}-\frac {2 i \sqrt {a^2+b^2} \text {arctanh}\left (\frac {2 b-2 a \tanh \left (\frac {x}{2}\right )}{2 \sqrt {a^2+b^2}}\right )}{a}\right )}{a}\) |
((-I)*((I*b*ArcTanh[Cosh[x]])/a - ((2*I)*Sqrt[a^2 + b^2]*ArcTanh[(2*b - 2* a*Tanh[x/2])/(2*Sqrt[a^2 + b^2])])/a))/a - Coth[x]/a
3.3.33.3.1 Defintions of rubi rules used
Int[(Complex[0, a_])*(Fx_), x_Symbol] :> Simp[(Complex[Identity[0], a]) I nt[Fx, x], x] /; FreeQ[a, x] && EqQ[a^2, 1]
Int[((a_) + (b_.)*(x_)^2)^(-1), x_Symbol] :> Simp[(1/(Rt[a, 2]*Rt[-b, 2]))* ArcTanh[Rt[-b, 2]*(x/Rt[a, 2])], x] /; FreeQ[{a, b}, x] && NegQ[a/b] && (Gt Q[a, 0] || LtQ[b, 0])
Int[((a_) + (b_.)*(x_) + (c_.)*(x_)^2)^(-1), x_Symbol] :> Simp[-2 Subst[I nt[1/Simp[b^2 - 4*a*c - x^2, x], x], x, b + 2*c*x], x] /; FreeQ[{a, b, c}, x]
Int[((a_) + (b_.)*sin[(c_.) + (d_.)*(x_)])^(-1), x_Symbol] :> With[{e = Fre eFactors[Tan[(c + d*x)/2], x]}, Simp[2*(e/d) Subst[Int[1/(a + 2*b*e*x + a *e^2*x^2), x], x, Tan[(c + d*x)/2]/e], x]] /; FreeQ[{a, b, c, d}, x] && NeQ [a^2 - b^2, 0]
Int[((a_) + (b_.)*sin[(e_.) + (f_.)*(x_)])^(m_)/tan[(e_.) + (f_.)*(x_)]^2, x_Symbol] :> Int[(a + b*Sin[e + f*x])^m*((1 - Sin[e + f*x]^2)/Sin[e + f*x]^ 2), x] /; FreeQ[{a, b, e, f, m}, x] && NeQ[a^2 - b^2, 0]
Int[((A_.) + (B_.)*sin[(e_.) + (f_.)*(x_)])/(((a_.) + (b_.)*sin[(e_.) + (f_ .)*(x_)])*((c_.) + (d_.)*sin[(e_.) + (f_.)*(x_)])), x_Symbol] :> Simp[(A*b - a*B)/(b*c - a*d) Int[1/(a + b*Sin[e + f*x]), x], x] + Simp[(B*c - A*d)/ (b*c - a*d) Int[1/(c + d*Sin[e + f*x]), x], x] /; FreeQ[{a, b, c, d, e, f , A, B}, x] && NeQ[b*c - a*d, 0] && NeQ[a^2 - b^2, 0] && NeQ[c^2 - d^2, 0]
Int[((a_.) + (b_.)*sin[(e_.) + (f_.)*(x_)])^(m_)*((c_.) + (d_.)*sin[(e_.) + (f_.)*(x_)])^(n_)*((A_.) + (C_.)*sin[(e_.) + (f_.)*(x_)]^2), x_Symbol] :> Simp[(-(A*b^2 + a^2*C))*Cos[e + f*x]*(a + b*Sin[e + f*x])^(m + 1)*((c + d*S in[e + f*x])^(n + 1)/(f*(m + 1)*(b*c - a*d)*(a^2 - b^2))), x] + Simp[1/((m + 1)*(b*c - a*d)*(a^2 - b^2)) Int[(a + b*Sin[e + f*x])^(m + 1)*(c + d*Sin [e + f*x])^n*Simp[a*(m + 1)*(b*c - a*d)*(A + C) + d*(A*b^2 + a^2*C)*(m + n + 2) - (c*(A*b^2 + a^2*C) + b*(m + 1)*(b*c - a*d)*(A + C))*Sin[e + f*x] - d *(A*b^2 + a^2*C)*(m + n + 3)*Sin[e + f*x]^2, x], x], x] /; FreeQ[{a, b, c, d, e, f, A, C, n}, x] && NeQ[b*c - a*d, 0] && NeQ[a^2 - b^2, 0] && NeQ[c^2 - d^2, 0] && LtQ[m, -1] && ((EqQ[a, 0] && IntegerQ[m] && !IntegerQ[n]) || !(IntegerQ[2*n] && LtQ[n, -1] && ((IntegerQ[n] && !IntegerQ[m]) || EqQ[a, 0])))
Int[csc[(c_.) + (d_.)*(x_)], x_Symbol] :> Simp[-ArcTanh[Cos[c + d*x]]/d, x] /; FreeQ[{c, d}, x]
Time = 0.68 (sec) , antiderivative size = 81, normalized size of antiderivative = 1.45
| method | result | size |
| default | \(-\frac {\tanh \left (\frac {x}{2}\right )}{2 a}-\frac {\left (-4 a^{2}-4 b^{2}\right ) \operatorname {arctanh}\left (\frac {2 a \tanh \left (\frac {x}{2}\right )-2 b}{2 \sqrt {a^{2}+b^{2}}}\right )}{2 a^{2} \sqrt {a^{2}+b^{2}}}-\frac {1}{2 a \tanh \left (\frac {x}{2}\right )}-\frac {b \ln \left (\tanh \left (\frac {x}{2}\right )\right )}{a^{2}}\) | \(81\) |
| risch | \(-\frac {2}{a \left ({\mathrm e}^{2 x}-1\right )}+\frac {b \ln \left ({\mathrm e}^{x}+1\right )}{a^{2}}-\frac {b \ln \left ({\mathrm e}^{x}-1\right )}{a^{2}}+\frac {\sqrt {a^{2}+b^{2}}\, \ln \left ({\mathrm e}^{x}-\frac {-a +\sqrt {a^{2}+b^{2}}}{b}\right )}{a^{2}}-\frac {\sqrt {a^{2}+b^{2}}\, \ln \left ({\mathrm e}^{x}+\frac {a +\sqrt {a^{2}+b^{2}}}{b}\right )}{a^{2}}\) | \(104\) |
-1/2/a*tanh(1/2*x)-1/2/a^2*(-4*a^2-4*b^2)/(a^2+b^2)^(1/2)*arctanh(1/2*(2*a *tanh(1/2*x)-2*b)/(a^2+b^2)^(1/2))-1/2/a/tanh(1/2*x)-1/a^2*b*ln(tanh(1/2*x ))
Leaf count of result is larger than twice the leaf count of optimal. 228 vs. \(2 (52) = 104\).
Time = 0.30 (sec) , antiderivative size = 228, normalized size of antiderivative = 4.07 \[ \int \frac {\coth ^2(x)}{a+b \sinh (x)} \, dx=\frac {\sqrt {a^{2} + b^{2}} {\left (\cosh \left (x\right )^{2} + 2 \, \cosh \left (x\right ) \sinh \left (x\right ) + \sinh \left (x\right )^{2} - 1\right )} \log \left (\frac {b^{2} \cosh \left (x\right )^{2} + b^{2} \sinh \left (x\right )^{2} + 2 \, a b \cosh \left (x\right ) + 2 \, a^{2} + b^{2} + 2 \, {\left (b^{2} \cosh \left (x\right ) + a b\right )} \sinh \left (x\right ) - 2 \, \sqrt {a^{2} + b^{2}} {\left (b \cosh \left (x\right ) + b \sinh \left (x\right ) + a\right )}}{b \cosh \left (x\right )^{2} + b \sinh \left (x\right )^{2} + 2 \, a \cosh \left (x\right ) + 2 \, {\left (b \cosh \left (x\right ) + a\right )} \sinh \left (x\right ) - b}\right ) + {\left (b \cosh \left (x\right )^{2} + 2 \, b \cosh \left (x\right ) \sinh \left (x\right ) + b \sinh \left (x\right )^{2} - b\right )} \log \left (\cosh \left (x\right ) + \sinh \left (x\right ) + 1\right ) - {\left (b \cosh \left (x\right )^{2} + 2 \, b \cosh \left (x\right ) \sinh \left (x\right ) + b \sinh \left (x\right )^{2} - b\right )} \log \left (\cosh \left (x\right ) + \sinh \left (x\right ) - 1\right ) - 2 \, a}{a^{2} \cosh \left (x\right )^{2} + 2 \, a^{2} \cosh \left (x\right ) \sinh \left (x\right ) + a^{2} \sinh \left (x\right )^{2} - a^{2}} \]
(sqrt(a^2 + b^2)*(cosh(x)^2 + 2*cosh(x)*sinh(x) + sinh(x)^2 - 1)*log((b^2* cosh(x)^2 + b^2*sinh(x)^2 + 2*a*b*cosh(x) + 2*a^2 + b^2 + 2*(b^2*cosh(x) + a*b)*sinh(x) - 2*sqrt(a^2 + b^2)*(b*cosh(x) + b*sinh(x) + a))/(b*cosh(x)^ 2 + b*sinh(x)^2 + 2*a*cosh(x) + 2*(b*cosh(x) + a)*sinh(x) - b)) + (b*cosh( x)^2 + 2*b*cosh(x)*sinh(x) + b*sinh(x)^2 - b)*log(cosh(x) + sinh(x) + 1) - (b*cosh(x)^2 + 2*b*cosh(x)*sinh(x) + b*sinh(x)^2 - b)*log(cosh(x) + sinh( x) - 1) - 2*a)/(a^2*cosh(x)^2 + 2*a^2*cosh(x)*sinh(x) + a^2*sinh(x)^2 - a^ 2)
\[ \int \frac {\coth ^2(x)}{a+b \sinh (x)} \, dx=\int \frac {\coth ^{2}{\left (x \right )}}{a + b \sinh {\left (x \right )}}\, dx \]
Time = 0.33 (sec) , antiderivative size = 97, normalized size of antiderivative = 1.73 \[ \int \frac {\coth ^2(x)}{a+b \sinh (x)} \, dx=\frac {b \log \left (e^{\left (-x\right )} + 1\right )}{a^{2}} - \frac {b \log \left (e^{\left (-x\right )} - 1\right )}{a^{2}} + \frac {\sqrt {a^{2} + b^{2}} \log \left (\frac {b e^{\left (-x\right )} - a - \sqrt {a^{2} + b^{2}}}{b e^{\left (-x\right )} - a + \sqrt {a^{2} + b^{2}}}\right )}{a^{2}} + \frac {2}{a e^{\left (-2 \, x\right )} - a} \]
b*log(e^(-x) + 1)/a^2 - b*log(e^(-x) - 1)/a^2 + sqrt(a^2 + b^2)*log((b*e^( -x) - a - sqrt(a^2 + b^2))/(b*e^(-x) - a + sqrt(a^2 + b^2)))/a^2 + 2/(a*e^ (-2*x) - a)
Time = 0.27 (sec) , antiderivative size = 95, normalized size of antiderivative = 1.70 \[ \int \frac {\coth ^2(x)}{a+b \sinh (x)} \, dx=\frac {b \log \left (e^{x} + 1\right )}{a^{2}} - \frac {b \log \left ({\left | e^{x} - 1 \right |}\right )}{a^{2}} + \frac {\sqrt {a^{2} + b^{2}} \log \left (\frac {{\left | 2 \, b e^{x} + 2 \, a - 2 \, \sqrt {a^{2} + b^{2}} \right |}}{{\left | 2 \, b e^{x} + 2 \, a + 2 \, \sqrt {a^{2} + b^{2}} \right |}}\right )}{a^{2}} - \frac {2}{a {\left (e^{\left (2 \, x\right )} - 1\right )}} \]
b*log(e^x + 1)/a^2 - b*log(abs(e^x - 1))/a^2 + sqrt(a^2 + b^2)*log(abs(2*b *e^x + 2*a - 2*sqrt(a^2 + b^2))/abs(2*b*e^x + 2*a + 2*sqrt(a^2 + b^2)))/a^ 2 - 2/(a*(e^(2*x) - 1))
Time = 1.56 (sec) , antiderivative size = 304, normalized size of antiderivative = 5.43 \[ \int \frac {\coth ^2(x)}{a+b \sinh (x)} \, dx=\frac {2}{a-a\,{\mathrm {e}}^{2\,x}}-\frac {b\,\ln \left (32\,a^2+32\,b^2-32\,a^2\,{\mathrm {e}}^x-32\,b^2\,{\mathrm {e}}^x\right )}{a^2}+\frac {b\,\ln \left (32\,a^2+32\,b^2+32\,a^2\,{\mathrm {e}}^x+32\,b^2\,{\mathrm {e}}^x\right )}{a^2}+\frac {\ln \left (128\,a^4\,{\mathrm {e}}^x-64\,a\,b^3-64\,a^3\,b-32\,b^3\,\sqrt {a^2+b^2}+32\,b^4\,{\mathrm {e}}^x+128\,a^3\,{\mathrm {e}}^x\,\sqrt {a^2+b^2}+160\,a^2\,b^2\,{\mathrm {e}}^x-64\,a^2\,b\,\sqrt {a^2+b^2}+96\,a\,b^2\,{\mathrm {e}}^x\,\sqrt {a^2+b^2}\right )\,\sqrt {a^2+b^2}}{a^2}-\frac {\ln \left (32\,b^3\,\sqrt {a^2+b^2}-64\,a\,b^3-64\,a^3\,b+128\,a^4\,{\mathrm {e}}^x+32\,b^4\,{\mathrm {e}}^x-128\,a^3\,{\mathrm {e}}^x\,\sqrt {a^2+b^2}+160\,a^2\,b^2\,{\mathrm {e}}^x+64\,a^2\,b\,\sqrt {a^2+b^2}-96\,a\,b^2\,{\mathrm {e}}^x\,\sqrt {a^2+b^2}\right )\,\sqrt {a^2+b^2}}{a^2} \]
2/(a - a*exp(2*x)) - (b*log(32*a^2 + 32*b^2 - 32*a^2*exp(x) - 32*b^2*exp(x )))/a^2 + (b*log(32*a^2 + 32*b^2 + 32*a^2*exp(x) + 32*b^2*exp(x)))/a^2 + ( log(128*a^4*exp(x) - 64*a*b^3 - 64*a^3*b - 32*b^3*(a^2 + b^2)^(1/2) + 32*b ^4*exp(x) + 128*a^3*exp(x)*(a^2 + b^2)^(1/2) + 160*a^2*b^2*exp(x) - 64*a^2 *b*(a^2 + b^2)^(1/2) + 96*a*b^2*exp(x)*(a^2 + b^2)^(1/2))*(a^2 + b^2)^(1/2 ))/a^2 - (log(32*b^3*(a^2 + b^2)^(1/2) - 64*a*b^3 - 64*a^3*b + 128*a^4*exp (x) + 32*b^4*exp(x) - 128*a^3*exp(x)*(a^2 + b^2)^(1/2) + 160*a^2*b^2*exp(x ) + 64*a^2*b*(a^2 + b^2)^(1/2) - 96*a*b^2*exp(x)*(a^2 + b^2)^(1/2))*(a^2 + b^2)^(1/2))/a^2