Optimal. Leaf size=78 \[ -\frac {a^3 \tanh ^{-1}\left (\frac {\sqrt {b} \sin (x)}{\sqrt {a+b}}\right )}{b^{7/2} \sqrt {a+b}}+\frac {\left (a^2-a b+b^2\right ) \sin (x)}{b^3}+\frac {(a-2 b) \sin ^3(x)}{3 b^2}+\frac {\sin ^5(x)}{5 b} \]
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Rubi [A] time = 0.08, antiderivative size = 78, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 3, integrand size = 15, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.200, Rules used = {3186, 390, 208} \[ \frac {\left (a^2-a b+b^2\right ) \sin (x)}{b^3}-\frac {a^3 \tanh ^{-1}\left (\frac {\sqrt {b} \sin (x)}{\sqrt {a+b}}\right )}{b^{7/2} \sqrt {a+b}}+\frac {(a-2 b) \sin ^3(x)}{3 b^2}+\frac {\sin ^5(x)}{5 b} \]
Antiderivative was successfully verified.
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Rule 208
Rule 390
Rule 3186
Rubi steps
\begin {align*} \int \frac {\cos ^7(x)}{a+b \cos ^2(x)} \, dx &=\operatorname {Subst}\left (\int \frac {\left (1-x^2\right )^3}{a+b-b x^2} \, dx,x,\sin (x)\right )\\ &=\operatorname {Subst}\left (\int \left (\frac {a^2-a b+b^2}{b^3}+\frac {(a-2 b) x^2}{b^2}+\frac {x^4}{b}-\frac {a^3}{b^3 \left (a+b-b x^2\right )}\right ) \, dx,x,\sin (x)\right )\\ &=\frac {\left (a^2-a b+b^2\right ) \sin (x)}{b^3}+\frac {(a-2 b) \sin ^3(x)}{3 b^2}+\frac {\sin ^5(x)}{5 b}-\frac {a^3 \operatorname {Subst}\left (\int \frac {1}{a+b-b x^2} \, dx,x,\sin (x)\right )}{b^3}\\ &=-\frac {a^3 \tanh ^{-1}\left (\frac {\sqrt {b} \sin (x)}{\sqrt {a+b}}\right )}{b^{7/2} \sqrt {a+b}}+\frac {\left (a^2-a b+b^2\right ) \sin (x)}{b^3}+\frac {(a-2 b) \sin ^3(x)}{3 b^2}+\frac {\sin ^5(x)}{5 b}\\ \end {align*}
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Mathematica [A] time = 0.42, size = 111, normalized size = 1.42 \[ \frac {a^3 \left (\log \left (\sqrt {a+b}-\sqrt {b} \sin (x)\right )-\log \left (\sqrt {a+b}+\sqrt {b} \sin (x)\right )\right )}{2 b^{7/2} \sqrt {a+b}}+\frac {\left (8 a^2-6 a b+5 b^2\right ) \sin (x)}{8 b^3}+\frac {(5 b-4 a) \sin (3 x)}{48 b^2}+\frac {\sin (5 x)}{80 b} \]
Antiderivative was successfully verified.
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fricas [A] time = 2.13, size = 259, normalized size = 3.32 \[ \left [\frac {15 \, \sqrt {a b + b^{2}} a^{3} \log \left (-\frac {b \cos \relax (x)^{2} + 2 \, \sqrt {a b + b^{2}} \sin \relax (x) - a - 2 \, b}{b \cos \relax (x)^{2} + a}\right ) + 2 \, {\left (3 \, {\left (a b^{3} + b^{4}\right )} \cos \relax (x)^{4} + 15 \, a^{3} b + 5 \, a^{2} b^{2} - 2 \, a b^{3} + 8 \, b^{4} - {\left (5 \, a^{2} b^{2} + a b^{3} - 4 \, b^{4}\right )} \cos \relax (x)^{2}\right )} \sin \relax (x)}{30 \, {\left (a b^{4} + b^{5}\right )}}, \frac {15 \, \sqrt {-a b - b^{2}} a^{3} \arctan \left (\frac {\sqrt {-a b - b^{2}} \sin \relax (x)}{a + b}\right ) + {\left (3 \, {\left (a b^{3} + b^{4}\right )} \cos \relax (x)^{4} + 15 \, a^{3} b + 5 \, a^{2} b^{2} - 2 \, a b^{3} + 8 \, b^{4} - {\left (5 \, a^{2} b^{2} + a b^{3} - 4 \, b^{4}\right )} \cos \relax (x)^{2}\right )} \sin \relax (x)}{15 \, {\left (a b^{4} + b^{5}\right )}}\right ] \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [A] time = 0.18, size = 96, normalized size = 1.23 \[ \frac {a^{3} \arctan \left (\frac {b \sin \relax (x)}{\sqrt {-a b - b^{2}}}\right )}{\sqrt {-a b - b^{2}} b^{3}} + \frac {3 \, b^{4} \sin \relax (x)^{5} + 5 \, a b^{3} \sin \relax (x)^{3} - 10 \, b^{4} \sin \relax (x)^{3} + 15 \, a^{2} b^{2} \sin \relax (x) - 15 \, a b^{3} \sin \relax (x) + 15 \, b^{4} \sin \relax (x)}{15 \, b^{5}} \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [A] time = 0.06, size = 78, normalized size = 1.00 \[ \frac {\frac {\left (\sin ^{5}\relax (x )\right ) b^{2}}{5}+\frac {\left (\sin ^{3}\relax (x )\right ) a b}{3}-\frac {2 \left (\sin ^{3}\relax (x )\right ) b^{2}}{3}+a^{2} \sin \relax (x )-a b \sin \relax (x )+b^{2} \sin \relax (x )}{b^{3}}-\frac {a^{3} \arctanh \left (\frac {\sin \relax (x ) b}{\sqrt {\left (a +b \right ) b}}\right )}{b^{3} \sqrt {\left (a +b \right ) b}} \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [A] time = 1.08, size = 91, normalized size = 1.17 \[ \frac {a^{3} \log \left (\frac {b \sin \relax (x) - \sqrt {{\left (a + b\right )} b}}{b \sin \relax (x) + \sqrt {{\left (a + b\right )} b}}\right )}{2 \, \sqrt {{\left (a + b\right )} b} b^{3}} + \frac {3 \, b^{2} \sin \relax (x)^{5} + 5 \, {\left (a b - 2 \, b^{2}\right )} \sin \relax (x)^{3} + 15 \, {\left (a^{2} - a b + b^{2}\right )} \sin \relax (x)}{15 \, b^{3}} \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [B] time = 0.13, size = 86, normalized size = 1.10 \[ \frac {{\sin \relax (x)}^5}{5\,b}+{\sin \relax (x)}^3\,\left (\frac {a+b}{3\,b^2}-\frac {1}{b}\right )+\sin \relax (x)\,\left (\frac {3}{b}+\frac {\left (a+b\right )\,\left (\frac {a+b}{b^2}-\frac {3}{b}\right )}{b}\right )+\frac {a^3\,\mathrm {atan}\left (\frac {\sqrt {b}\,\sin \relax (x)\,1{}\mathrm {i}}{\sqrt {a+b}}\right )\,1{}\mathrm {i}}{b^{7/2}\,\sqrt {a+b}} \]
Verification of antiderivative is not currently implemented for this CAS.
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sympy [F(-1)] time = 0.00, size = 0, normalized size = 0.00 \[ \text {Timed out} \]
Verification of antiderivative is not currently implemented for this CAS.
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