Optimal. Leaf size=38 \[ \frac{1}{3} \left (1-x^2\right )^{3/2}+\frac{1}{2} x \sqrt{1-x^2}+\frac{1}{2} \sin ^{-1}(x) \]
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Rubi [A] time = 0.0061408, antiderivative size = 38, normalized size of antiderivative = 1., number of steps used = 3, number of rules used = 3, integrand size = 17, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.176, Rules used = {641, 195, 216} \[ \frac{1}{3} \left (1-x^2\right )^{3/2}+\frac{1}{2} x \sqrt{1-x^2}+\frac{1}{2} \sin ^{-1}(x) \]
Antiderivative was successfully verified.
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Rule 641
Rule 195
Rule 216
Rubi steps
\begin{align*} \int (1-x) \sqrt{1-x^2} \, dx &=\frac{1}{3} \left (1-x^2\right )^{3/2}+\int \sqrt{1-x^2} \, dx\\ &=\frac{1}{2} x \sqrt{1-x^2}+\frac{1}{3} \left (1-x^2\right )^{3/2}+\frac{1}{2} \int \frac{1}{\sqrt{1-x^2}} \, dx\\ &=\frac{1}{2} x \sqrt{1-x^2}+\frac{1}{3} \left (1-x^2\right )^{3/2}+\frac{1}{2} \sin ^{-1}(x)\\ \end{align*}
Mathematica [A] time = 0.0149647, size = 32, normalized size = 0.84 \[ \frac{1}{6} \left (3 \sin ^{-1}(x)-\sqrt{1-x^2} \left (2 x^2-3 x-2\right )\right ) \]
Antiderivative was successfully verified.
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Maple [A] time = 0.043, size = 29, normalized size = 0.8 \begin{align*}{\frac{1}{3} \left ( -{x}^{2}+1 \right ) ^{{\frac{3}{2}}}}+{\frac{\arcsin \left ( x \right ) }{2}}+{\frac{x}{2}\sqrt{-{x}^{2}+1}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.56012, size = 38, normalized size = 1. \begin{align*} \frac{1}{3} \,{\left (-x^{2} + 1\right )}^{\frac{3}{2}} + \frac{1}{2} \, \sqrt{-x^{2} + 1} x + \frac{1}{2} \, \arcsin \left (x\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 2.32611, size = 97, normalized size = 2.55 \begin{align*} -\frac{1}{6} \,{\left (2 \, x^{2} - 3 \, x - 2\right )} \sqrt{-x^{2} + 1} - \arctan \left (\frac{\sqrt{-x^{2} + 1} - 1}{x}\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 0.195379, size = 39, normalized size = 1.03 \begin{align*} - \frac{x^{2} \sqrt{1 - x^{2}}}{3} + \frac{x \sqrt{1 - x^{2}}}{2} + \frac{\sqrt{1 - x^{2}}}{3} + \frac{\operatorname{asin}{\left (x \right )}}{2} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.20527, size = 34, normalized size = 0.89 \begin{align*} -\frac{1}{6} \,{\left ({\left (2 \, x - 3\right )} x - 2\right )} \sqrt{-x^{2} + 1} + \frac{1}{2} \, \arcsin \left (x\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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