Optimal. Leaf size=20 \[ -x-\frac {2 i \cosh (x)}{1-i \sinh (x)} \]
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Rubi [A]
time = 0.03, antiderivative size = 20, normalized size of antiderivative = 1.00, number of steps
used = 3, number of rules used = 3, integrand size = 11, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.273, Rules used = {4476, 2759, 8}
\begin {gather*} -x-\frac {2 i \cosh (x)}{1-i \sinh (x)} \end {gather*}
Antiderivative was successfully verified.
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Rule 8
Rule 2759
Rule 4476
Rubi steps
\begin {align*} \int \frac {1}{(\text {sech}(x)-i \tanh (x))^2} \, dx &=\int \frac {\cosh ^2(x)}{(1-i \sinh (x))^2} \, dx\\ &=-\frac {2 i \cosh (x)}{1-i \sinh (x)}-\int 1 \, dx\\ &=-x-\frac {2 i \cosh (x)}{1-i \sinh (x)}\\ \end {align*}
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Mathematica [A]
time = 0.02, size = 31, normalized size = 1.55 \begin {gather*} -x+\frac {4 \sinh \left (\frac {x}{2}\right )}{\cosh \left (\frac {x}{2}\right )-i \sinh \left (\frac {x}{2}\right )} \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 1.72, size = 29, normalized size = 1.45
method | result | size |
risch | \(-x -\frac {4 i}{{\mathrm e}^{x}+i}\) | \(15\) |
default | \(\frac {4}{i+\tanh \left (\frac {x}{2}\right )}+\ln \left (\tanh \left (\frac {x}{2}\right )-1\right )-\ln \left (\tanh \left (\frac {x}{2}\right )+1\right )\) | \(29\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.26, size = 14, normalized size = 0.70 \begin {gather*} -x - \frac {4 i}{e^{\left (-x\right )} - i} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 0.37, size = 17, normalized size = 0.85 \begin {gather*} -\frac {x e^{x} + i \, x + 4 i}{e^{x} + i} \end {gather*}
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 \begin {gather*} \int \frac {1}{\left (- i \tanh {\left (x \right )} + \operatorname {sech}{\left (x \right )}\right )^{2}}\, dx \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A]
time = 0.41, size = 12, normalized size = 0.60 \begin {gather*} -x - \frac {4 i}{e^{x} + i} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 1.51, size = 14, normalized size = 0.70 \begin {gather*} -x-\frac {4{}\mathrm {i}}{{\mathrm {e}}^x+1{}\mathrm {i}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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