Optimal. Leaf size=10 \[ \frac {1}{3} \sin ^{-1}\left (\frac {3 x}{2}\right ) \]
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Rubi [A]
time = 0.00, antiderivative size = 10, normalized size of antiderivative = 1.00, 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 = {222}
\begin {gather*} \frac {1}{3} \text {ArcSin}\left (\frac {3 x}{2}\right ) \end {gather*}
Antiderivative was successfully verified.
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Rule 222
Rubi steps
\begin {align*} \int \frac {1}{\sqrt {4-9 x^2}} \, dx &=\frac {1}{3} \sin ^{-1}\left (\frac {3 x}{2}\right )\\ \end {align*}
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Mathematica [C] Result contains complex when optimal does not.
time = 0.02, size = 24, normalized size = 2.40 \begin {gather*} \frac {1}{3} i \log \left (-3 i x+\sqrt {4-9 x^2}\right ) \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 0.53, size = 7, normalized size = 0.70
method | result | size |
default | \(\frac {\arcsin \left (\frac {3 x}{2}\right )}{3}\) | \(7\) |
meijerg | \(\frac {\arcsin \left (\frac {3 x}{2}\right )}{3}\) | \(7\) |
trager | \(-\frac {\RootOf \left (\textit {\_Z}^{2}+1\right ) \ln \left (-\RootOf \left (\textit {\_Z}^{2}+1\right ) \sqrt {-9 x^{2}+4}+3 x \right )}{3}\) | \(31\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.50, size = 6, normalized size = 0.60 \begin {gather*} \frac {1}{3} \, \arcsin \left (\frac {3}{2} \, x\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [B] Leaf count of result is larger than twice the leaf count of optimal. 19 vs.
\(2 (6) = 12\).
time = 0.34, size = 19, normalized size = 1.90 \begin {gather*} -\frac {2}{3} \, \arctan \left (\frac {\sqrt {-9 \, x^{2} + 4} - 2}{3 \, x}\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A]
time = 0.05, size = 7, normalized size = 0.70 \begin {gather*} \frac {\operatorname {asin}{\left (\frac {3 x}{2} \right )}}{3} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [B] Leaf count of result is larger than twice the leaf count of optimal. 19 vs.
\(2 (6) = 12\).
time = 2.67, size = 19, normalized size = 1.90 \begin {gather*} \frac {1}{2} \, \sqrt {-9 \, x^{2} + 4} x + \frac {2}{3} \, \arcsin \left (\frac {3}{2} \, x\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 0.01, size = 6, normalized size = 0.60 \begin {gather*} \frac {\mathrm {asin}\left (\frac {3\,x}{2}\right )}{3} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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