Optimal. Leaf size=59 \[ -\frac{x (2 a+3 b)}{2 b^2}+\frac{(a+b)^{3/2} \tan ^{-1}\left (\frac{\sqrt{a+b} \tan (x)}{\sqrt{a}}\right )}{\sqrt{a} b^2}-\frac{\sin (x) \cos (x)}{2 b} \]
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Rubi [A] time = 0.108488, antiderivative size = 59, 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 = {3191, 414, 522, 203, 205} \[ -\frac{x (2 a+3 b)}{2 b^2}+\frac{(a+b)^{3/2} \tan ^{-1}\left (\frac{\sqrt{a+b} \tan (x)}{\sqrt{a}}\right )}{\sqrt{a} b^2}-\frac{\sin (x) \cos (x)}{2 b} \]
Antiderivative was successfully verified.
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Rule 3191
Rule 414
Rule 522
Rule 203
Rule 205
Rubi steps
\begin{align*} \int \frac{\cos ^4(x)}{a+b \sin ^2(x)} \, dx &=\operatorname{Subst}\left (\int \frac{1}{\left (1+x^2\right )^2 \left (a+(a+b) x^2\right )} \, dx,x,\tan (x)\right )\\ &=-\frac{\cos (x) \sin (x)}{2 b}+\frac{\operatorname{Subst}\left (\int \frac{a+2 b+(-a-b) x^2}{\left (1+x^2\right ) \left (a+(a+b) x^2\right )} \, dx,x,\tan (x)\right )}{2 b}\\ &=-\frac{\cos (x) \sin (x)}{2 b}+\frac{(a+b)^2 \operatorname{Subst}\left (\int \frac{1}{a+(a+b) x^2} \, dx,x,\tan (x)\right )}{b^2}-\frac{(2 a+3 b) \operatorname{Subst}\left (\int \frac{1}{1+x^2} \, dx,x,\tan (x)\right )}{2 b^2}\\ &=-\frac{(2 a+3 b) x}{2 b^2}+\frac{(a+b)^{3/2} \tan ^{-1}\left (\frac{\sqrt{a+b} \tan (x)}{\sqrt{a}}\right )}{\sqrt{a} b^2}-\frac{\cos (x) \sin (x)}{2 b}\\ \end{align*}
Mathematica [A] time = 0.151682, size = 55, normalized size = 0.93 \[ \frac{\frac{4 (a+b)^{3/2} \tan ^{-1}\left (\frac{\sqrt{a+b} \tan (x)}{\sqrt{a}}\right )}{\sqrt{a}}-2 (2 a x+3 b x+b \sin (x) \cos (x))}{4 b^2} \]
Antiderivative was successfully verified.
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Maple [B] time = 0.079, size = 111, normalized size = 1.9 \begin{align*} -{\frac{\tan \left ( x \right ) }{2\,b \left ( \left ( \tan \left ( x \right ) \right ) ^{2}+1 \right ) }}-{\frac{3\,\arctan \left ( \tan \left ( x \right ) \right ) }{2\,b}}-{\frac{\arctan \left ( \tan \left ( x \right ) \right ) a}{{b}^{2}}}+{\frac{{a}^{2}}{{b}^{2}}\arctan \left ({ \left ( a+b \right ) \tan \left ( x \right ){\frac{1}{\sqrt{a \left ( a+b \right ) }}}} \right ){\frac{1}{\sqrt{a \left ( a+b \right ) }}}}+2\,{\frac{a}{b\sqrt{a \left ( a+b \right ) }}\arctan \left ({\frac{ \left ( a+b \right ) \tan \left ( x \right ) }{\sqrt{a \left ( a+b \right ) }}} \right ) }+{\arctan \left ({ \left ( a+b \right ) \tan \left ( x \right ){\frac{1}{\sqrt{a \left ( a+b \right ) }}}} \right ){\frac{1}{\sqrt{a \left ( a+b \right ) }}}} \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 = 2.05545, size = 617, normalized size = 10.46 \begin{align*} \left [-\frac{2 \, b \cos \left (x\right ) \sin \left (x\right ) -{\left (a + b\right )} \sqrt{-\frac{a + b}{a}} \log \left (\frac{{\left (8 \, a^{2} + 8 \, a b + b^{2}\right )} \cos \left (x\right )^{4} - 2 \,{\left (4 \, a^{2} + 5 \, a b + b^{2}\right )} \cos \left (x\right )^{2} - 4 \,{\left ({\left (2 \, a^{2} + a b\right )} \cos \left (x\right )^{3} -{\left (a^{2} + a b\right )} \cos \left (x\right )\right )} \sqrt{-\frac{a + b}{a}} \sin \left (x\right ) + a^{2} + 2 \, a b + b^{2}}{b^{2} \cos \left (x\right )^{4} - 2 \,{\left (a b + b^{2}\right )} \cos \left (x\right )^{2} + a^{2} + 2 \, a b + b^{2}}\right ) + 2 \,{\left (2 \, a + 3 \, b\right )} x}{4 \, b^{2}}, -\frac{b \cos \left (x\right ) \sin \left (x\right ) +{\left (a + b\right )} \sqrt{\frac{a + b}{a}} \arctan \left (\frac{{\left ({\left (2 \, a + b\right )} \cos \left (x\right )^{2} - a - b\right )} \sqrt{\frac{a + b}{a}}}{2 \,{\left (a + b\right )} \cos \left (x\right ) \sin \left (x\right )}\right ) +{\left (2 \, a + 3 \, 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 = 1.12514, size = 124, normalized size = 2.1 \begin{align*} -\frac{{\left (2 \, a + 3 \, b\right )} x}{2 \, b^{2}} + \frac{{\left (\pi \left \lfloor \frac{x}{\pi } + \frac{1}{2} \right \rfloor \mathrm{sgn}\left (2 \, a + 2 \, b\right ) + \arctan \left (\frac{a \tan \left (x\right ) + b \tan \left (x\right )}{\sqrt{a^{2} + a b}}\right )\right )}{\left (a^{2} + 2 \, a b + b^{2}\right )}}{\sqrt{a^{2} + a b} 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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