Optimal. Leaf size=47 \[ \frac {2 \sqrt {a} \tanh ^{-1}\left (\frac {\sqrt {a+b \cos ^n(x)}}{\sqrt {a}}\right )}{n}-\frac {2 \sqrt {a+b \cos ^n(x)}}{n} \]
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Rubi [A]
time = 0.05, antiderivative size = 47, normalized size of antiderivative = 1.00, number of steps
used = 5, number of rules used = 5, integrand size = 15, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.333, Rules used = {3309, 272, 52,
65, 214} \begin {gather*} \frac {2 \sqrt {a} \tanh ^{-1}\left (\frac {\sqrt {a+b \cos ^n(x)}}{\sqrt {a}}\right )}{n}-\frac {2 \sqrt {a+b \cos ^n(x)}}{n} \end {gather*}
Antiderivative was successfully verified.
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Rule 52
Rule 65
Rule 214
Rule 272
Rule 3309
Rubi steps
\begin {align*} \int \sqrt {a+b \cos ^n(x)} \tan (x) \, dx &=-\text {Subst}\left (\int \frac {\sqrt {a+b x^n}}{x} \, dx,x,\cos (x)\right )\\ &=-\frac {\text {Subst}\left (\int \frac {\sqrt {a+b x}}{x} \, dx,x,\cos ^n(x)\right )}{n}\\ &=-\frac {2 \sqrt {a+b \cos ^n(x)}}{n}-\frac {a \text {Subst}\left (\int \frac {1}{x \sqrt {a+b x}} \, dx,x,\cos ^n(x)\right )}{n}\\ &=-\frac {2 \sqrt {a+b \cos ^n(x)}}{n}-\frac {(2 a) \text {Subst}\left (\int \frac {1}{-\frac {a}{b}+\frac {x^2}{b}} \, dx,x,\sqrt {a+b \cos ^n(x)}\right )}{b n}\\ &=\frac {2 \sqrt {a} \tanh ^{-1}\left (\frac {\sqrt {a+b \cos ^n(x)}}{\sqrt {a}}\right )}{n}-\frac {2 \sqrt {a+b \cos ^n(x)}}{n}\\ \end {align*}
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Mathematica [A]
time = 0.04, size = 46, normalized size = 0.98 \begin {gather*} -\frac {-2 \sqrt {a} \tanh ^{-1}\left (\frac {\sqrt {a+b \cos ^n(x)}}{\sqrt {a}}\right )+2 \sqrt {a+b \cos ^n(x)}}{n} \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 0.57, size = 39, normalized size = 0.83
method | result | size |
derivativedivides | \(-\frac {2 \sqrt {a +b \left (\cos ^{n}\left (x \right )\right )}-2 \sqrt {a}\, \arctanh \left (\frac {\sqrt {a +b \left (\cos ^{n}\left (x \right )\right )}}{\sqrt {a}}\right )}{n}\) | \(39\) |
default | \(-\frac {2 \sqrt {a +b \left (\cos ^{n}\left (x \right )\right )}-2 \sqrt {a}\, \arctanh \left (\frac {\sqrt {a +b \left (\cos ^{n}\left (x \right )\right )}}{\sqrt {a}}\right )}{n}\) | \(39\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.49, size = 58, normalized size = 1.23 \begin {gather*} -\frac {\sqrt {a} \log \left (\frac {\sqrt {b \cos \left (x\right )^{n} + a} - \sqrt {a}}{\sqrt {b \cos \left (x\right )^{n} + a} + \sqrt {a}}\right )}{n} - \frac {2 \, \sqrt {b \cos \left (x\right )^{n} + a}}{n} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 0.38, size = 97, normalized size = 2.06 \begin {gather*} \left [\frac {\sqrt {a} \log \left (\frac {b \cos \left (x\right )^{n} + 2 \, \sqrt {b \cos \left (x\right )^{n} + a} \sqrt {a} + 2 \, a}{\cos \left (x\right )^{n}}\right ) - 2 \, \sqrt {b \cos \left (x\right )^{n} + a}}{n}, -\frac {2 \, {\left (\sqrt {-a} \arctan \left (\frac {\sqrt {b \cos \left (x\right )^{n} + a} \sqrt {-a}}{a}\right ) + \sqrt {b \cos \left (x\right )^{n} + a}\right )}}{n}\right ] \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \sqrt {a + b \cos ^{n}{\left (x \right )}} \tan {\left (x \right )}\, dx \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A]
time = 0.49, size = 46, normalized size = 0.98 \begin {gather*} -\frac {2 \, {\left (\frac {a b \arctan \left (\frac {\sqrt {b \cos \left (x\right )^{n} + a}}{\sqrt {-a}}\right )}{\sqrt {-a}} + \sqrt {b \cos \left (x\right )^{n} + a} b\right )}}{b n} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [F]
time = 0.00, size = -1, normalized size = -0.02 \begin {gather*} \int \mathrm {tan}\left (x\right )\,\sqrt {a+b\,{\cos \left (x\right )}^n} \,d x \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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