Optimal. Leaf size=10 \[ \frac {\tan ^{-1}\left (\frac {x}{a}\right )}{a} \]
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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 = 9, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.111, Rules used = {209}
\begin {gather*} \frac {\text {ArcTan}\left (\frac {x}{a}\right )}{a} \end {gather*}
Antiderivative was successfully verified.
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Rule 209
Rubi steps
\begin {align*} \int \frac {1}{a^2+x^2} \, dx &=\frac {\tan ^{-1}\left (\frac {x}{a}\right )}{a}\\ \end {align*}
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Mathematica [A]
time = 0.00, size = 10, normalized size = 1.00 \begin {gather*} \frac {\tan ^{-1}\left (\frac {x}{a}\right )}{a} \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 0.21, size = 11, normalized size = 1.10
method | result | size |
default | \(\frac {\arctan \left (\frac {x}{a}\right )}{a}\) | \(11\) |
risch | \(\frac {\arctan \left (\frac {x}{a}\right )}{a}\) | \(11\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.48, size = 10, normalized size = 1.00 \begin {gather*} \frac {\arctan \left (\frac {x}{a}\right )}{a} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 0.38, size = 10, normalized size = 1.00 \begin {gather*} \frac {\arctan \left (\frac {x}{a}\right )}{a} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [C] Result contains complex when optimal does not.
time = 0.03, size = 20, normalized size = 2.00 \begin {gather*} \frac {- \frac {i \log {\left (- i a + x \right )}}{2} + \frac {i \log {\left (i a + x \right )}}{2}}{a} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A]
time = 3.44, size = 10, normalized size = 1.00 \begin {gather*} \frac {\arctan \left (\frac {x}{a}\right )}{a} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 2.25, size = 10, normalized size = 1.00 \begin {gather*} \frac {\mathrm {atan}\left (\frac {x}{a}\right )}{a} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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