Optimal. Leaf size=74 \[ \frac {x}{4}+\frac {i x^2}{4}-\frac {1}{2} x \log \left (1-e^{2 i x}\right )+\frac {1}{2} x \log (\sin (x))+\frac {1}{4} i \text {Li}_2\left (e^{2 i x}\right )+\frac {1}{4} \cos (x) \sin (x)-\frac {1}{2} \cos (x) \log (\sin (x)) \sin (x) \]
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Rubi [A]
time = 0.08, antiderivative size = 74, normalized size of antiderivative = 1.00, number of steps
used = 10, number of rules used = 9, integrand size = 8, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 1.125, Rules used = {2715, 8, 2634,
12, 6874, 3798, 2221, 2317, 2438} \begin {gather*} \frac {1}{4} i \text {PolyLog}\left (2,e^{2 i x}\right )+\frac {i x^2}{4}+\frac {x}{4}-\frac {1}{2} x \log \left (1-e^{2 i x}\right )+\frac {1}{2} x \log (\sin (x))+\frac {1}{4} \sin (x) \cos (x)-\frac {1}{2} \sin (x) \cos (x) \log (\sin (x)) \end {gather*}
Antiderivative was successfully verified.
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Rule 8
Rule 12
Rule 2221
Rule 2317
Rule 2438
Rule 2634
Rule 2715
Rule 3798
Rule 6874
Rubi steps
\begin {align*} \int \log (\sin (x)) \sin ^2(x) \, dx &=\frac {1}{2} x \log (\sin (x))-\frac {1}{2} \cos (x) \log (\sin (x)) \sin (x)-\int \frac {1}{2} \cot (x) (x-\cos (x) \sin (x)) \, dx\\ &=\frac {1}{2} x \log (\sin (x))-\frac {1}{2} \cos (x) \log (\sin (x)) \sin (x)-\frac {1}{2} \int \cot (x) (x-\cos (x) \sin (x)) \, dx\\ &=\frac {1}{2} x \log (\sin (x))-\frac {1}{2} \cos (x) \log (\sin (x)) \sin (x)-\frac {1}{2} \int \left (-\cos ^2(x)+x \cot (x)\right ) \, dx\\ &=\frac {1}{2} x \log (\sin (x))-\frac {1}{2} \cos (x) \log (\sin (x)) \sin (x)+\frac {1}{2} \int \cos ^2(x) \, dx-\frac {1}{2} \int x \cot (x) \, dx\\ &=\frac {i x^2}{4}+\frac {1}{2} x \log (\sin (x))+\frac {1}{4} \cos (x) \sin (x)-\frac {1}{2} \cos (x) \log (\sin (x)) \sin (x)+i \int \frac {e^{2 i x} x}{1-e^{2 i x}} \, dx+\frac {\int 1 \, dx}{4}\\ &=\frac {x}{4}+\frac {i x^2}{4}-\frac {1}{2} x \log \left (1-e^{2 i x}\right )+\frac {1}{2} x \log (\sin (x))+\frac {1}{4} \cos (x) \sin (x)-\frac {1}{2} \cos (x) \log (\sin (x)) \sin (x)+\frac {1}{2} \int \log \left (1-e^{2 i x}\right ) \, dx\\ &=\frac {x}{4}+\frac {i x^2}{4}-\frac {1}{2} x \log \left (1-e^{2 i x}\right )+\frac {1}{2} x \log (\sin (x))+\frac {1}{4} \cos (x) \sin (x)-\frac {1}{2} \cos (x) \log (\sin (x)) \sin (x)-\frac {1}{4} i \text {Subst}\left (\int \frac {\log (1-x)}{x} \, dx,x,e^{2 i x}\right )\\ &=\frac {x}{4}+\frac {i x^2}{4}-\frac {1}{2} x \log \left (1-e^{2 i x}\right )+\frac {1}{2} x \log (\sin (x))+\frac {1}{4} i \text {Li}_2\left (e^{2 i x}\right )+\frac {1}{4} \cos (x) \sin (x)-\frac {1}{2} \cos (x) \log (\sin (x)) \sin (x)\\ \end {align*}
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Mathematica [A]
time = 0.04, size = 59, normalized size = 0.80 \begin {gather*} \frac {1}{8} \left (2 x \left (1+i x-2 \log \left (1-e^{2 i x}\right )+2 \log (\sin (x))\right )+2 i \text {Li}_2\left (e^{2 i x}\right )+(1-2 \log (\sin (x))) \sin (2 x)\right ) \end {gather*}
Antiderivative was successfully verified.
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Maple [B] Both result and optimal contain complex but leaf count of result is larger than twice
the leaf count of optimal. 194 vs. \(2 (54 ) = 108\).
time = 0.12, size = 195, normalized size = 2.64
method | result | size |
default | \(\frac {i \left (\frac {\ln \left (i \left (1-{\mathrm e}^{2 i x}\right ) {\mathrm e}^{-i x}\right ) {\mathrm e}^{2 i x}}{2}-\frac {{\mathrm e}^{2 i x}}{4}-2 \ln \left ({\mathrm e}^{i x}\right ) \ln \left (i \left (1-{\mathrm e}^{2 i x}\right ) {\mathrm e}^{-i x}\right )-\ln \left ({\mathrm e}^{i x}\right )^{2}+2 \ln \left ({\mathrm e}^{i x}\right ) \ln \left ({\mathrm e}^{i x}+1\right )-2 \dilog \left ({\mathrm e}^{i x}\right )+2 \dilog \left ({\mathrm e}^{i x}+1\right )-\frac {{\mathrm e}^{-2 i x} \ln \left (i \left (1-{\mathrm e}^{2 i x}\right ) {\mathrm e}^{-i x}\right )}{2}+\frac {{\mathrm e}^{-2 i x}}{4}-\ln \left ({\mathrm e}^{i x}\right )-\frac {\ln \left (2\right ) {\mathrm e}^{2 i x}}{2}+\frac {{\mathrm e}^{-2 i x} \ln \left (2\right )}{2}+2 \ln \left (2\right ) \ln \left ({\mathrm e}^{i x}\right )\right )}{4}\) | \(195\) |
risch | \(\text {Expression too large to display}\) | \(675\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [B] Both result and optimal contain complex but leaf count of result is larger than
twice the leaf count of optimal. 104 vs. \(2 (49) = 98\).
time = 0.67, size = 104, normalized size = 1.41 \begin {gather*} \frac {1}{4} i \, x^{2} - \frac {1}{2} i \, x \arctan \left (\sin \left (x\right ), \cos \left (x\right ) + 1\right ) + \frac {1}{2} i \, x \arctan \left (\sin \left (x\right ), -\cos \left (x\right ) + 1\right ) - \frac {1}{4} \, x \log \left (\cos \left (x\right )^{2} + \sin \left (x\right )^{2} + 2 \, \cos \left (x\right ) + 1\right ) - \frac {1}{4} \, x \log \left (\cos \left (x\right )^{2} + \sin \left (x\right )^{2} - 2 \, \cos \left (x\right ) + 1\right ) + \frac {1}{4} \, {\left (2 \, x - \sin \left (2 \, x\right )\right )} \log \left (\sin \left (x\right )\right ) + \frac {1}{4} \, x + \frac {1}{2} i \, {\rm Li}_2\left (-e^{\left (i \, x\right )}\right ) + \frac {1}{2} i \, {\rm Li}_2\left (e^{\left (i \, x\right )}\right ) + \frac {1}{8} \, \sin \left (2 \, x\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [B] Both result and optimal contain complex but leaf count of result is larger than twice
the leaf count of optimal. 120 vs. \(2 (49) = 98\).
time = 0.41, size = 120, normalized size = 1.62 \begin {gather*} -\frac {1}{4} \, x \log \left (\cos \left (x\right ) + i \, \sin \left (x\right ) + 1\right ) - \frac {1}{4} \, x \log \left (\cos \left (x\right ) - i \, \sin \left (x\right ) + 1\right ) - \frac {1}{4} \, x \log \left (-\cos \left (x\right ) + i \, \sin \left (x\right ) + 1\right ) - \frac {1}{4} \, x \log \left (-\cos \left (x\right ) - i \, \sin \left (x\right ) + 1\right ) - \frac {1}{2} \, {\left (\cos \left (x\right ) \sin \left (x\right ) - x\right )} \log \left (\sin \left (x\right )\right ) + \frac {1}{4} \, \cos \left (x\right ) \sin \left (x\right ) + \frac {1}{4} \, x + \frac {1}{4} i \, {\rm Li}_2\left (\cos \left (x\right ) + i \, \sin \left (x\right )\right ) - \frac {1}{4} i \, {\rm Li}_2\left (\cos \left (x\right ) - i \, \sin \left (x\right )\right ) - \frac {1}{4} i \, {\rm Li}_2\left (-\cos \left (x\right ) + i \, \sin \left (x\right )\right ) + \frac {1}{4} i \, {\rm Li}_2\left (-\cos \left (x\right ) - i \, \sin \left (x\right )\right ) \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 \log {\left (\sin {\left (x \right )} \right )} \sin ^{2}{\left (x \right )}\, dx \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {could not integrate} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [F]
time = 0.00, size = -1, normalized size = -0.01 \begin {gather*} \int \ln \left (\sin \left (x\right )\right )\,{\sin \left (x\right )}^2 \,d x \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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