Optimal. Leaf size=10 \[ \frac{1}{2} \sin ^{-1}\left (\frac{2 x}{3}\right ) \]
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Rubi [A] time = 0.0014207, antiderivative size = 10, normalized size of antiderivative = 1., number of steps used = 1, number of rules used = 1, integrand size = 11, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.091, Rules used = {216} \[ \frac{1}{2} \sin ^{-1}\left (\frac{2 x}{3}\right ) \]
Antiderivative was successfully verified.
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Rule 216
Rubi steps
\begin{align*} \int \frac{1}{\sqrt{9-4 x^2}} \, dx &=\frac{1}{2} \sin ^{-1}\left (\frac{2 x}{3}\right )\\ \end{align*}
Mathematica [A] time = 0.0036364, size = 10, normalized size = 1. \[ \frac{1}{2} \sin ^{-1}\left (\frac{2 x}{3}\right ) \]
Antiderivative was successfully verified.
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Maple [A] time = 0.003, size = 7, normalized size = 0.7 \begin{align*}{\frac{1}{2}\arcsin \left ({\frac{2\,x}{3}} \right ) } \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 3.71767, size = 8, normalized size = 0.8 \begin{align*} \frac{1}{2} \, \arcsin \left (\frac{2}{3} \, x\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [B] time = 1.26488, size = 53, normalized size = 5.3 \begin{align*} -\arctan \left (\frac{\sqrt{-4 \, x^{2} + 9} - 3}{2 \, x}\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 0.134488, size = 7, normalized size = 0.7 \begin{align*} \frac{\operatorname{asin}{\left (\frac{2 x}{3} \right )}}{2} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 2.09543, size = 8, normalized size = 0.8 \begin{align*} \frac{1}{2} \, \arcsin \left (\frac{2}{3} \, x\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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