Optimal. Leaf size=34 \[ \sqrt {2} x-\sqrt {2} \tan ^{-1}\left (\frac {\cos (x) \sin (x)}{1+\sqrt {2}+\cos ^2(x)}\right ) \]
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Rubi [A]
time = 0.01, antiderivative size = 34, normalized size of antiderivative = 1.00, number of steps
used = 3, number of rules used = 3, integrand size = 10, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.300, Rules used = {12, 3260, 209}
\begin {gather*} \sqrt {2} x-\sqrt {2} \tan ^{-1}\left (\frac {\sin (x) \cos (x)}{\cos ^2(x)+\sqrt {2}+1}\right ) \end {gather*}
Antiderivative was successfully verified.
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Rule 12
Rule 209
Rule 3260
Rubi steps
\begin {align*} \int \frac {2}{1+\cos ^2(x)} \, dx &=2 \int \frac {1}{1+\cos ^2(x)} \, dx\\ &=-\left (2 \text {Subst}\left (\int \frac {1}{1+2 x^2} \, dx,x,\cot (x)\right )\right )\\ &=\sqrt {2} x-\sqrt {2} \tan ^{-1}\left (\frac {\cos (x) \sin (x)}{1+\sqrt {2}+\cos ^2(x)}\right )\\ \end {align*}
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Mathematica [A]
time = 0.01, size = 15, normalized size = 0.44 \begin {gather*} \sqrt {2} \tan ^{-1}\left (\frac {\tan (x)}{\sqrt {2}}\right ) \end {gather*}
Antiderivative was successfully verified.
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Mathics [C] Result contains higher order function than in optimal. Order 9 vs. order 3 in
optimal.
time = 2.82, size = 39, normalized size = 1.15 \begin {gather*} \sqrt {2} \left (2 \text {Pi} \text {Floor}\left [-\frac {1}{2}+\frac {x}{2 \text {Pi}}\right ]+\text {ArcTan}\left [-1+\sqrt {2} \text {Tan}\left [\frac {x}{2}\right ]\right ]+\text {ArcTan}\left [1+\sqrt {2} \text {Tan}\left [\frac {x}{2}\right ]\right ]\right ) \end {gather*}
Warning: Unable to verify antiderivative.
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Maple [A]
time = 0.04, size = 13, normalized size = 0.38
method | result | size |
default | \(\sqrt {2}\, \arctan \left (\frac {\tan \left (x \right ) \sqrt {2}}{2}\right )\) | \(13\) |
risch | \(\frac {i \sqrt {2}\, \ln \left ({\mathrm e}^{2 i x}+2 \sqrt {2}+3\right )}{2}-\frac {i \sqrt {2}\, \ln \left ({\mathrm e}^{2 i x}-2 \sqrt {2}+3\right )}{2}\) | \(40\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.35, size = 12, normalized size = 0.35 \begin {gather*} \sqrt {2} \arctan \left (\frac {1}{2} \, \sqrt {2} \tan \left (x\right )\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 0.31, size = 31, normalized size = 0.91 \begin {gather*} -\frac {1}{2} \, \sqrt {2} \arctan \left (\frac {3 \, \sqrt {2} \cos \left (x\right )^{2} - \sqrt {2}}{4 \, \cos \left (x\right ) \sin \left (x\right )}\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A]
time = 0.26, size = 60, normalized size = 1.76 \begin {gather*} \sqrt {2} \left (\operatorname {atan}{\left (\sqrt {2} \tan {\left (\frac {x}{2} \right )} - 1 \right )} + \pi \left \lfloor {\frac {\frac {x}{2} - \frac {\pi }{2}}{\pi }}\right \rfloor \right ) + \sqrt {2} \left (\operatorname {atan}{\left (\sqrt {2} \tan {\left (\frac {x}{2} \right )} + 1 \right )} + \pi \left \lfloor {\frac {\frac {x}{2} - \frac {\pi }{2}}{\pi }}\right \rfloor \right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A]
time = 0.00, size = 54, normalized size = 1.59 \begin {gather*} \frac {2\cdot 2 \left (\arctan \left (\frac {-\sqrt {2} \sin \left (2 x\right )+\sin \left (2 x\right )}{\sqrt {2} \cos \left (2 x\right )+\sqrt {2}-\cos \left (2 x\right )+1}\right )+x\right )}{2 \sqrt {2}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 0.21, size = 24, normalized size = 0.71 \begin {gather*} \sqrt {2}\,\left (x-\mathrm {atan}\left (\mathrm {tan}\left (x\right )\right )\right )+\sqrt {2}\,\mathrm {atan}\left (\frac {\sqrt {2}\,\mathrm {tan}\left (x\right )}{2}\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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