Optimal. Leaf size=14 \[ -\tanh ^{-1}\left (\frac {\coth (x)}{\sqrt {\text {csch}^2(x)}}\right ) \]
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Rubi [A] time = 0.02, antiderivative size = 14, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 4, integrand size = 10, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.400, Rules used = {3657, 4122, 217, 206} \[ -\tanh ^{-1}\left (\frac {\coth (x)}{\sqrt {\text {csch}^2(x)}}\right ) \]
Antiderivative was successfully verified.
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Rule 206
Rule 217
Rule 3657
Rule 4122
Rubi steps
\begin {align*} \int \sqrt {-1+\coth ^2(x)} \, dx &=\int \sqrt {\text {csch}^2(x)} \, dx\\ &=-\operatorname {Subst}\left (\int \frac {1}{\sqrt {-1+x^2}} \, dx,x,\coth (x)\right )\\ &=-\operatorname {Subst}\left (\int \frac {1}{1-x^2} \, dx,x,\frac {\coth (x)}{\sqrt {\text {csch}^2(x)}}\right )\\ &=-\tanh ^{-1}\left (\frac {\coth (x)}{\sqrt {\text {csch}^2(x)}}\right )\\ \end {align*}
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Mathematica [A] time = 0.01, size = 18, normalized size = 1.29 \[ \sinh (x) \sqrt {\text {csch}^2(x)} \log \left (\tanh \left (\frac {x}{2}\right )\right ) \]
Antiderivative was successfully verified.
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fricas [A] time = 0.44, size = 17, normalized size = 1.21 \[ -\log \left (\cosh \relax (x) + \sinh \relax (x) + 1\right ) + \log \left (\cosh \relax (x) + \sinh \relax (x) - 1\right ) \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [A] time = 0.12, size = 23, normalized size = 1.64 \[ -{\left (\log \left (e^{x} + 1\right ) - \log \left ({\left | e^{x} - 1 \right |}\right )\right )} \mathrm {sgn}\left (e^{\left (2 \, x\right )} - 1\right ) \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [A] time = 0.14, size = 15, normalized size = 1.07 \[ -\ln \left (\coth \relax (x )+\sqrt {-1+\coth ^{2}\relax (x )}\right ) \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [A] time = 0.42, size = 17, normalized size = 1.21 \[ \log \left (e^{\left (-x\right )} + 1\right ) - \log \left (e^{\left (-x\right )} - 1\right ) \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [B] time = 1.37, size = 14, normalized size = 1.00 \[ -\ln \left (\mathrm {coth}\relax (x)+\sqrt {{\mathrm {coth}\relax (x)}^2-1}\right ) \]
Verification of antiderivative is not currently implemented for this CAS.
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sympy [F] time = 0.00, size = 0, normalized size = 0.00 \[ \int \sqrt {\coth ^{2}{\relax (x )} - 1}\, dx \]
Verification of antiderivative is not currently implemented for this CAS.
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