Optimal. Leaf size=59 \[ \frac {x \sqrt {1-a^2 x^2}}{6 a}-\frac {\left (1-a^2 x^2\right )^{3/2} \tanh ^{-1}(a x)}{3 a^2}+\frac {\sin ^{-1}(a x)}{6 a^2} \]
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Rubi [A] time = 0.05, antiderivative size = 59, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, integrand size = 20, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.150, Rules used = {5994, 195, 216} \[ \frac {x \sqrt {1-a^2 x^2}}{6 a}-\frac {\left (1-a^2 x^2\right )^{3/2} \tanh ^{-1}(a x)}{3 a^2}+\frac {\sin ^{-1}(a x)}{6 a^2} \]
Antiderivative was successfully verified.
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Rule 195
Rule 216
Rule 5994
Rubi steps
\begin {align*} \int x \sqrt {1-a^2 x^2} \tanh ^{-1}(a x) \, dx &=-\frac {\left (1-a^2 x^2\right )^{3/2} \tanh ^{-1}(a x)}{3 a^2}+\frac {\int \sqrt {1-a^2 x^2} \, dx}{3 a}\\ &=\frac {x \sqrt {1-a^2 x^2}}{6 a}-\frac {\left (1-a^2 x^2\right )^{3/2} \tanh ^{-1}(a x)}{3 a^2}+\frac {\int \frac {1}{\sqrt {1-a^2 x^2}} \, dx}{6 a}\\ &=\frac {x \sqrt {1-a^2 x^2}}{6 a}+\frac {\sin ^{-1}(a x)}{6 a^2}-\frac {\left (1-a^2 x^2\right )^{3/2} \tanh ^{-1}(a x)}{3 a^2}\\ \end {align*}
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Mathematica [A] time = 0.05, size = 49, normalized size = 0.83 \[ \frac {a x \sqrt {1-a^2 x^2}-2 \left (1-a^2 x^2\right )^{3/2} \tanh ^{-1}(a x)+\sin ^{-1}(a x)}{6 a^2} \]
Antiderivative was successfully verified.
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fricas [A] time = 0.56, size = 72, normalized size = 1.22 \[ \frac {\sqrt {-a^{2} x^{2} + 1} {\left (a x + {\left (a^{2} x^{2} - 1\right )} \log \left (-\frac {a x + 1}{a x - 1}\right )\right )} - 2 \, \arctan \left (\frac {\sqrt {-a^{2} x^{2} + 1} - 1}{a x}\right )}{6 \, a^{2}} \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [F(-2)] time = 0.00, size = 0, normalized size = 0.00 \[ \text {Exception raised: TypeError} \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [C] time = 0.32, size = 99, normalized size = 1.68 \[ \frac {\sqrt {-\left (a x -1\right ) \left (a x +1\right )}\, \left (2 a^{2} x^{2} \arctanh \left (a x \right )+a x -2 \arctanh \left (a x \right )\right )}{6 a^{2}}+\frac {i \ln \left (\frac {a x +1}{\sqrt {-a^{2} x^{2}+1}}+i\right )}{6 a^{2}}-\frac {i \ln \left (\frac {a x +1}{\sqrt {-a^{2} x^{2}+1}}-i\right )}{6 a^{2}} \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [A] time = 0.41, size = 50, normalized size = 0.85 \[ -\frac {{\left (-a^{2} x^{2} + 1\right )}^{\frac {3}{2}} \operatorname {artanh}\left (a x\right )}{3 \, a^{2}} + \frac {\sqrt {-a^{2} x^{2} + 1} x + \frac {\arcsin \left (a x\right )}{a}}{6 \, a} \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [F] time = 0.00, size = -1, normalized size = -0.02 \[ \int x\,\mathrm {atanh}\left (a\,x\right )\,\sqrt {1-a^2\,x^2} \,d x \]
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 \[ \int x \sqrt {- \left (a x - 1\right ) \left (a x + 1\right )} \operatorname {atanh}{\left (a x \right )}\, dx \]
Verification of antiderivative is not currently implemented for this CAS.
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