Integrand size = 20, antiderivative size = 58 \[ \int \cos (x) \left (-\cos ^2(x)-5 \sin ^2(x)\right )^{3/2} \, dx=\frac {3}{16} \arctan \left (\frac {2 \sin (x)}{\sqrt {-1-4 \sin ^2(x)}}\right )-\frac {3}{8} \sin (x) \sqrt {-1-4 \sin ^2(x)}+\frac {1}{4} \sin (x) \left (-1-4 \sin ^2(x)\right )^{3/2} \]
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Time = 0.04 (sec) , antiderivative size = 58, normalized size of antiderivative = 1.00, number of steps used = 5, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.200, Rules used = {4441, 201, 223, 209} \[ \int \cos (x) \left (-\cos ^2(x)-5 \sin ^2(x)\right )^{3/2} \, dx=\frac {3}{16} \arctan \left (\frac {2 \sin (x)}{\sqrt {-4 \sin ^2(x)-1}}\right )+\frac {1}{4} \sin (x) \left (-4 \sin ^2(x)-1\right )^{3/2}-\frac {3}{8} \sin (x) \sqrt {-4 \sin ^2(x)-1} \]
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Rule 201
Rule 209
Rule 223
Rule 4441
Rubi steps \begin{align*} \text {integral}& = \text {Subst}\left (\int \left (-1-4 x^2\right )^{3/2} \, dx,x,\sin (x)\right ) \\ & = \frac {1}{4} \sin (x) \left (-1-4 \sin ^2(x)\right )^{3/2}-\frac {3}{4} \text {Subst}\left (\int \sqrt {-1-4 x^2} \, dx,x,\sin (x)\right ) \\ & = -\frac {3}{8} \sin (x) \sqrt {-1-4 \sin ^2(x)}+\frac {1}{4} \sin (x) \left (-1-4 \sin ^2(x)\right )^{3/2}+\frac {3}{8} \text {Subst}\left (\int \frac {1}{\sqrt {-1-4 x^2}} \, dx,x,\sin (x)\right ) \\ & = -\frac {3}{8} \sin (x) \sqrt {-1-4 \sin ^2(x)}+\frac {1}{4} \sin (x) \left (-1-4 \sin ^2(x)\right )^{3/2}+\frac {3}{8} \text {Subst}\left (\int \frac {1}{1+4 x^2} \, dx,x,\frac {\sin (x)}{\sqrt {-1-4 \sin ^2(x)}}\right ) \\ & = \frac {3}{16} \arctan \left (\frac {2 \sin (x)}{\sqrt {-1-4 \sin ^2(x)}}\right )-\frac {3}{8} \sin (x) \sqrt {-1-4 \sin ^2(x)}+\frac {1}{4} \sin (x) \left (-1-4 \sin ^2(x)\right )^{3/2} \\ \end{align*}
Time = 0.08 (sec) , antiderivative size = 61, normalized size of antiderivative = 1.05 \[ \int \cos (x) \left (-\cos ^2(x)-5 \sin ^2(x)\right )^{3/2} \, dx=\frac {\sqrt {-3+2 \cos (2 x)} \left (-3 \text {arcsinh}(2 \sin (x))+2 \sqrt {3-2 \cos (2 x)} (-11 \sin (x)+2 \sin (3 x))\right )}{16 \sqrt {1+4 \sin ^2(x)}} \]
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Time = 0.26 (sec) , antiderivative size = 47, normalized size of antiderivative = 0.81
method | result | size |
derivativedivides | \(\frac {3 \arctan \left (\frac {2 \sin \left (x \right )}{\sqrt {-1-4 \left (\sin ^{2}\left (x \right )\right )}}\right )}{16}+\frac {\sin \left (x \right ) {\left (-1-4 \left (\sin ^{2}\left (x \right )\right )\right )}^{\frac {3}{2}}}{4}-\frac {3 \sin \left (x \right ) \sqrt {-1-4 \left (\sin ^{2}\left (x \right )\right )}}{8}\) | \(47\) |
default | \(\frac {3 \arctan \left (\frac {2 \sin \left (x \right )}{\sqrt {-1-4 \left (\sin ^{2}\left (x \right )\right )}}\right )}{16}+\frac {\sin \left (x \right ) {\left (-1-4 \left (\sin ^{2}\left (x \right )\right )\right )}^{\frac {3}{2}}}{4}-\frac {3 \sin \left (x \right ) \sqrt {-1-4 \left (\sin ^{2}\left (x \right )\right )}}{8}\) | \(47\) |
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Result contains complex when optimal does not.
Time = 0.26 (sec) , antiderivative size = 123, normalized size of antiderivative = 2.12 \[ \int \cos (x) \left (-\cos ^2(x)-5 \sin ^2(x)\right )^{3/2} \, dx=\frac {1}{128} \, {\left (12 i \, e^{\left (4 i \, x\right )} \log \left (-\frac {1}{2} \, \sqrt {e^{\left (4 i \, x\right )} - 3 \, e^{\left (2 i \, x\right )} + 1} {\left (4 \, e^{\left (2 i \, x\right )} - 5\right )} + 2 \, e^{\left (4 i \, x\right )} - \frac {11}{2} \, e^{\left (2 i \, x\right )} + \frac {5}{2}\right ) - 12 i \, e^{\left (4 i \, x\right )} \log \left (\sqrt {e^{\left (4 i \, x\right )} - 3 \, e^{\left (2 i \, x\right )} + 1} - e^{\left (2 i \, x\right )} - 1\right ) - 8 \, {\left (2 i \, e^{\left (6 i \, x\right )} - 11 i \, e^{\left (4 i \, x\right )} + 11 i \, e^{\left (2 i \, x\right )} - 2 i\right )} \sqrt {e^{\left (4 i \, x\right )} - 3 \, e^{\left (2 i \, x\right )} + 1} - 145 i \, e^{\left (4 i \, x\right )}\right )} e^{\left (-4 i \, x\right )} \]
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Timed out. \[ \int \cos (x) \left (-\cos ^2(x)-5 \sin ^2(x)\right )^{3/2} \, dx=\text {Timed out} \]
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Result contains complex when optimal does not.
Time = 0.28 (sec) , antiderivative size = 36, normalized size of antiderivative = 0.62 \[ \int \cos (x) \left (-\cos ^2(x)-5 \sin ^2(x)\right )^{3/2} \, dx=\frac {1}{4} \, {\left (-4 \, \sin \left (x\right )^{2} - 1\right )}^{\frac {3}{2}} \sin \left (x\right ) - \frac {3}{8} \, \sqrt {-4 \, \sin \left (x\right )^{2} - 1} \sin \left (x\right ) - \frac {3}{16} i \, \operatorname {arsinh}\left (2 \, \sin \left (x\right )\right ) \]
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Result contains complex when optimal does not.
Time = 0.28 (sec) , antiderivative size = 41, normalized size of antiderivative = 0.71 \[ \int \cos (x) \left (-\cos ^2(x)-5 \sin ^2(x)\right )^{3/2} \, dx=-\frac {1}{8} i \, {\left (8 \, \sin \left (x\right )^{2} + 5\right )} \sqrt {4 \, \sin \left (x\right )^{2} + 1} \sin \left (x\right ) + \frac {3}{16} i \, \log \left (\sqrt {4 \, \sin \left (x\right )^{2} + 1} - 2 \, \sin \left (x\right )\right ) \]
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Timed out. \[ \int \cos (x) \left (-\cos ^2(x)-5 \sin ^2(x)\right )^{3/2} \, dx=\int \cos \left (x\right )\,{\left (-{\cos \left (x\right )}^2-5\,{\sin \left (x\right )}^2\right )}^{3/2} \,d x \]
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