Optimal. Leaf size=60 \[ -\frac{a^{3/2} \tan ^{-1}\left (\frac{\sqrt{a+b} \cot (x)}{\sqrt{a}}\right )}{b^2 \sqrt{a+b}}-\frac{x (2 a-b)}{2 b^2}+\frac{\sin (x) \cos (x)}{2 b} \]
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Rubi [A] time = 0.0980954, antiderivative size = 60, normalized size of antiderivative = 1., 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 = {3187, 470, 522, 203, 205} \[ -\frac{a^{3/2} \tan ^{-1}\left (\frac{\sqrt{a+b} \cot (x)}{\sqrt{a}}\right )}{b^2 \sqrt{a+b}}-\frac{x (2 a-b)}{2 b^2}+\frac{\sin (x) \cos (x)}{2 b} \]
Antiderivative was successfully verified.
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Rule 3187
Rule 470
Rule 522
Rule 203
Rule 205
Rubi steps
\begin{align*} \int \frac{\cos ^4(x)}{a+b \cos ^2(x)} \, dx &=-\operatorname{Subst}\left (\int \frac{x^4}{\left (1+x^2\right )^2 \left (a+(a+b) x^2\right )} \, dx,x,\cot (x)\right )\\ &=\frac{\cos (x) \sin (x)}{2 b}-\frac{\operatorname{Subst}\left (\int \frac{a+(-a+b) x^2}{\left (1+x^2\right ) \left (a+(a+b) x^2\right )} \, dx,x,\cot (x)\right )}{2 b}\\ &=\frac{\cos (x) \sin (x)}{2 b}-\frac{a^2 \operatorname{Subst}\left (\int \frac{1}{a+(a+b) x^2} \, dx,x,\cot (x)\right )}{b^2}+\frac{(2 a-b) \operatorname{Subst}\left (\int \frac{1}{1+x^2} \, dx,x,\cot (x)\right )}{2 b^2}\\ &=-\frac{(2 a-b) x}{2 b^2}-\frac{a^{3/2} \tan ^{-1}\left (\frac{\sqrt{a+b} \cot (x)}{\sqrt{a}}\right )}{b^2 \sqrt{a+b}}+\frac{\cos (x) \sin (x)}{2 b}\\ \end{align*}
Mathematica [A] time = 0.120827, size = 52, normalized size = 0.87 \[ \frac{\frac{4 a^{3/2} \tan ^{-1}\left (\frac{\sqrt{a} \tan (x)}{\sqrt{a+b}}\right )}{\sqrt{a+b}}+2 x (b-2 a)+b \sin (2 x)}{4 b^2} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.02, size = 60, normalized size = 1. \begin{align*}{\frac{{a}^{2}}{{b}^{2}}\arctan \left ({a\tan \left ( x \right ){\frac{1}{\sqrt{ \left ( a+b \right ) a}}}} \right ){\frac{1}{\sqrt{ \left ( a+b \right ) a}}}}+{\frac{\tan \left ( x \right ) }{2\,b \left ( \left ( \tan \left ( x \right ) \right ) ^{2}+1 \right ) }}+{\frac{\arctan \left ( \tan \left ( x \right ) \right ) }{2\,b}}-{\frac{\arctan \left ( \tan \left ( x \right ) \right ) a}{{b}^{2}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F(-2)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Exception raised: ValueError} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.89124, size = 533, normalized size = 8.88 \begin{align*} \left [\frac{2 \, b \cos \left (x\right ) \sin \left (x\right ) + a \sqrt{-\frac{a}{a + b}} \log \left (\frac{{\left (8 \, a^{2} + 8 \, a b + b^{2}\right )} \cos \left (x\right )^{4} - 2 \,{\left (4 \, a^{2} + 3 \, a b\right )} \cos \left (x\right )^{2} - 4 \,{\left ({\left (2 \, a^{2} + 3 \, a b + b^{2}\right )} \cos \left (x\right )^{3} -{\left (a^{2} + a b\right )} \cos \left (x\right )\right )} \sqrt{-\frac{a}{a + b}} \sin \left (x\right ) + a^{2}}{b^{2} \cos \left (x\right )^{4} + 2 \, a b \cos \left (x\right )^{2} + a^{2}}\right ) - 2 \,{\left (2 \, a - b\right )} x}{4 \, b^{2}}, \frac{b \cos \left (x\right ) \sin \left (x\right ) - a \sqrt{\frac{a}{a + b}} \arctan \left (\frac{{\left ({\left (2 \, a + b\right )} \cos \left (x\right )^{2} - a\right )} \sqrt{\frac{a}{a + b}}}{2 \, a \cos \left (x\right ) \sin \left (x\right )}\right ) -{\left (2 \, a - b\right )} x}{2 \, b^{2}}\right ] \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F(-1)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Timed out} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.17355, size = 97, normalized size = 1.62 \begin{align*} \frac{{\left (\pi \left \lfloor \frac{x}{\pi } + \frac{1}{2} \right \rfloor \mathrm{sgn}\left (a\right ) + \arctan \left (\frac{a \tan \left (x\right )}{\sqrt{a^{2} + a b}}\right )\right )} a^{2}}{\sqrt{a^{2} + a b} b^{2}} - \frac{{\left (2 \, a - b\right )} x}{2 \, b^{2}} + \frac{\tan \left (x\right )}{2 \,{\left (\tan \left (x\right )^{2} + 1\right )} b} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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