Integrand size = 11, antiderivative size = 51 \[ \int \frac {1}{(a \sec (x)+b \tan (x))^3} \, dx=-\frac {\log (a+b \sin (x))}{b^3}+\frac {a^2-b^2}{2 b^3 (a+b \sin (x))^2}-\frac {2 a}{b^3 (a+b \sin (x))} \]
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Time = 0.09 (sec) , antiderivative size = 51, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.273, Rules used = {4476, 2747, 711} \[ \int \frac {1}{(a \sec (x)+b \tan (x))^3} \, dx=\frac {a^2-b^2}{2 b^3 (a+b \sin (x))^2}-\frac {2 a}{b^3 (a+b \sin (x))}-\frac {\log (a+b \sin (x))}{b^3} \]
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Rule 711
Rule 2747
Rule 4476
Rubi steps \begin{align*} \text {integral}& = \int \frac {\cos ^3(x)}{(a+b \sin (x))^3} \, dx \\ & = \frac {\text {Subst}\left (\int \frac {b^2-x^2}{(a+x)^3} \, dx,x,b \sin (x)\right )}{b^3} \\ & = \frac {\text {Subst}\left (\int \left (\frac {1}{-a-x}+\frac {-a^2+b^2}{(a+x)^3}+\frac {2 a}{(a+x)^2}\right ) \, dx,x,b \sin (x)\right )}{b^3} \\ & = -\frac {\log (a+b \sin (x))}{b^3}+\frac {a^2-b^2}{2 b^3 (a+b \sin (x))^2}-\frac {2 a}{b^3 (a+b \sin (x))} \\ \end{align*}
Time = 0.21 (sec) , antiderivative size = 40, normalized size of antiderivative = 0.78 \[ \int \frac {1}{(a \sec (x)+b \tan (x))^3} \, dx=-\frac {\log (a+b \sin (x))+\frac {3 a^2+b^2+4 a b \sin (x)}{2 (a+b \sin (x))^2}}{b^3} \]
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Time = 7.00 (sec) , antiderivative size = 50, normalized size of antiderivative = 0.98
method | result | size |
default | \(-\frac {\ln \left (a +b \sin \left (x \right )\right )}{b^{3}}-\frac {-a^{2}+b^{2}}{2 b^{3} \left (a +b \sin \left (x \right )\right )^{2}}-\frac {2 a}{b^{3} \left (a +b \sin \left (x \right )\right )}\) | \(50\) |
risch | \(\frac {i x}{b^{3}}-\frac {2 i \left (3 i a^{2} {\mathrm e}^{2 i x}+i b^{2} {\mathrm e}^{2 i x}+2 b a \,{\mathrm e}^{3 i x}-2 a b \,{\mathrm e}^{i x}\right )}{\left (b \,{\mathrm e}^{2 i x}-b +2 i a \,{\mathrm e}^{i x}\right )^{2} b^{3}}-\frac {\ln \left ({\mathrm e}^{2 i x}+\frac {2 i a \,{\mathrm e}^{i x}}{b}-1\right )}{b^{3}}\) | \(103\) |
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Time = 0.25 (sec) , antiderivative size = 83, normalized size of antiderivative = 1.63 \[ \int \frac {1}{(a \sec (x)+b \tan (x))^3} \, dx=\frac {4 \, a b \sin \left (x\right ) + 3 \, a^{2} + b^{2} - 2 \, {\left (b^{2} \cos \left (x\right )^{2} - 2 \, a b \sin \left (x\right ) - a^{2} - b^{2}\right )} \log \left (b \sin \left (x\right ) + a\right )}{2 \, {\left (b^{5} \cos \left (x\right )^{2} - 2 \, a b^{4} \sin \left (x\right ) - a^{2} b^{3} - b^{5}\right )}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 503 vs. \(2 (46) = 92\).
Time = 1.06 (sec) , antiderivative size = 503, normalized size of antiderivative = 9.86 \[ \int \frac {1}{(a \sec (x)+b \tan (x))^3} \, dx=\begin {cases} - \frac {2 a^{2} \log {\left (\frac {a \sec {\left (x \right )}}{b} + \tan {\left (x \right )} \right )} \sec ^{2}{\left (x \right )}}{2 a^{2} b^{3} \sec ^{2}{\left (x \right )} + 4 a b^{4} \tan {\left (x \right )} \sec {\left (x \right )} + 2 b^{5} \tan ^{2}{\left (x \right )}} + \frac {a^{2} \log {\left (\tan ^{2}{\left (x \right )} + 1 \right )} \sec ^{2}{\left (x \right )}}{2 a^{2} b^{3} \sec ^{2}{\left (x \right )} + 4 a b^{4} \tan {\left (x \right )} \sec {\left (x \right )} + 2 b^{5} \tan ^{2}{\left (x \right )}} - \frac {a^{2} \sec ^{2}{\left (x \right )}}{2 a^{2} b^{3} \sec ^{2}{\left (x \right )} + 4 a b^{4} \tan {\left (x \right )} \sec {\left (x \right )} + 2 b^{5} \tan ^{2}{\left (x \right )}} - \frac {4 a b \log {\left (\frac {a \sec {\left (x \right )}}{b} + \tan {\left (x \right )} \right )} \tan {\left (x \right )} \sec {\left (x \right )}}{2 a^{2} b^{3} \sec ^{2}{\left (x \right )} + 4 a b^{4} \tan {\left (x \right )} \sec {\left (x \right )} + 2 b^{5} \tan ^{2}{\left (x \right )}} + \frac {2 a b \log {\left (\tan ^{2}{\left (x \right )} + 1 \right )} \tan {\left (x \right )} \sec {\left (x \right )}}{2 a^{2} b^{3} \sec ^{2}{\left (x \right )} + 4 a b^{4} \tan {\left (x \right )} \sec {\left (x \right )} + 2 b^{5} \tan ^{2}{\left (x \right )}} - \frac {2 b^{2} \log {\left (\frac {a \sec {\left (x \right )}}{b} + \tan {\left (x \right )} \right )} \tan ^{2}{\left (x \right )}}{2 a^{2} b^{3} \sec ^{2}{\left (x \right )} + 4 a b^{4} \tan {\left (x \right )} \sec {\left (x \right )} + 2 b^{5} \tan ^{2}{\left (x \right )}} + \frac {b^{2} \log {\left (\tan ^{2}{\left (x \right )} + 1 \right )} \tan ^{2}{\left (x \right )}}{2 a^{2} b^{3} \sec ^{2}{\left (x \right )} + 4 a b^{4} \tan {\left (x \right )} \sec {\left (x \right )} + 2 b^{5} \tan ^{2}{\left (x \right )}} + \frac {b^{2} \tan ^{2}{\left (x \right )}}{2 a^{2} b^{3} \sec ^{2}{\left (x \right )} + 4 a b^{4} \tan {\left (x \right )} \sec {\left (x \right )} + 2 b^{5} \tan ^{2}{\left (x \right )}} - \frac {b^{2}}{2 a^{2} b^{3} \sec ^{2}{\left (x \right )} + 4 a b^{4} \tan {\left (x \right )} \sec {\left (x \right )} + 2 b^{5} \tan ^{2}{\left (x \right )}} & \text {for}\: b \neq 0 \\\frac {\frac {2 \tan ^{3}{\left (x \right )}}{3 \sec ^{3}{\left (x \right )}} + \frac {\tan {\left (x \right )}}{\sec ^{3}{\left (x \right )}}}{a^{3}} & \text {otherwise} \end {cases} \]
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Leaf count of result is larger than twice the leaf count of optimal. 201 vs. \(2 (49) = 98\).
Time = 0.31 (sec) , antiderivative size = 201, normalized size of antiderivative = 3.94 \[ \int \frac {1}{(a \sec (x)+b \tan (x))^3} \, dx=\frac {2 \, {\left (\frac {{\left (a^{3} + a b^{2}\right )} \sin \left (x\right )}{\cos \left (x\right ) + 1} + \frac {{\left (3 \, a^{2} b + b^{3}\right )} \sin \left (x\right )^{2}}{{\left (\cos \left (x\right ) + 1\right )}^{2}} + \frac {{\left (a^{3} + a b^{2}\right )} \sin \left (x\right )^{3}}{{\left (\cos \left (x\right ) + 1\right )}^{3}}\right )}}{a^{4} b^{2} + \frac {4 \, a^{3} b^{3} \sin \left (x\right )}{\cos \left (x\right ) + 1} + \frac {4 \, a^{3} b^{3} \sin \left (x\right )^{3}}{{\left (\cos \left (x\right ) + 1\right )}^{3}} + \frac {a^{4} b^{2} \sin \left (x\right )^{4}}{{\left (\cos \left (x\right ) + 1\right )}^{4}} + \frac {2 \, {\left (a^{4} b^{2} + 2 \, a^{2} b^{4}\right )} \sin \left (x\right )^{2}}{{\left (\cos \left (x\right ) + 1\right )}^{2}}} - \frac {\log \left (a + \frac {2 \, b \sin \left (x\right )}{\cos \left (x\right ) + 1} + \frac {a \sin \left (x\right )^{2}}{{\left (\cos \left (x\right ) + 1\right )}^{2}}\right )}{b^{3}} + \frac {\log \left (\frac {\sin \left (x\right )^{2}}{{\left (\cos \left (x\right ) + 1\right )}^{2}} + 1\right )}{b^{3}} \]
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Time = 0.27 (sec) , antiderivative size = 43, normalized size of antiderivative = 0.84 \[ \int \frac {1}{(a \sec (x)+b \tan (x))^3} \, dx=-\frac {\log \left ({\left | b \sin \left (x\right ) + a \right |}\right )}{b^{3}} + \frac {3 \, b \sin \left (x\right )^{2} + 2 \, a \sin \left (x\right ) - b}{2 \, {\left (b \sin \left (x\right ) + a\right )}^{2} b^{2}} \]
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Time = 29.63 (sec) , antiderivative size = 106, normalized size of antiderivative = 2.08 \[ \int \frac {1}{(a \sec (x)+b \tan (x))^3} \, dx=\frac {2\,a^3\,b\,\sin \left (x\right )+3\,a^2\,b^2\,{\sin \left (x\right )}^2+2\,a\,b^3\,\sin \left (x\right )+b^4\,{\sin \left (x\right )}^2}{2\,a^4\,b^3+4\,a^3\,b^4\,\sin \left (x\right )+2\,a^2\,b^5\,{\sin \left (x\right )}^2}-\frac {2\,\mathrm {atanh}\left (\frac {b^2+a\,\sin \left (x\right )\,b}{2\,a^2+\sin \left (x\right )\,a\,b-b^2}\right )}{b^3} \]
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