Integrand size = 14, antiderivative size = 46 \[ \int \frac {1}{\sqrt {a+a \cos (c+d x)}} \, dx=\frac {\sqrt {2} \text {arctanh}\left (\frac {\sqrt {a} \sin (c+d x)}{\sqrt {2} \sqrt {a+a \cos (c+d x)}}\right )}{\sqrt {a} d} \]
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Time = 0.04 (sec) , antiderivative size = 46, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.143, Rules used = {2728, 212} \[ \int \frac {1}{\sqrt {a+a \cos (c+d x)}} \, dx=\frac {\sqrt {2} \text {arctanh}\left (\frac {\sqrt {a} \sin (c+d x)}{\sqrt {2} \sqrt {a \cos (c+d x)+a}}\right )}{\sqrt {a} d} \]
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Rule 212
Rule 2728
Rubi steps \begin{align*} \text {integral}& = -\frac {2 \text {Subst}\left (\int \frac {1}{2 a-x^2} \, dx,x,-\frac {a \sin (c+d x)}{\sqrt {a+a \cos (c+d x)}}\right )}{d} \\ & = \frac {\sqrt {2} \text {arctanh}\left (\frac {\sqrt {a} \sin (c+d x)}{\sqrt {2} \sqrt {a+a \cos (c+d x)}}\right )}{\sqrt {a} d} \\ \end{align*}
Time = 0.02 (sec) , antiderivative size = 40, normalized size of antiderivative = 0.87 \[ \int \frac {1}{\sqrt {a+a \cos (c+d x)}} \, dx=\frac {2 \text {arctanh}\left (\sin \left (\frac {1}{2} (c+d x)\right )\right ) \cos \left (\frac {1}{2} (c+d x)\right )}{d \sqrt {a (1+\cos (c+d x))}} \]
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Result contains higher order function than in optimal. Order 9 vs. order 3.
Time = 0.29 (sec) , antiderivative size = 56, normalized size of antiderivative = 1.22
method | result | size |
default | \(\frac {\sqrt {2}\, \operatorname {am}^{-1}\left (\frac {d x}{2}+\frac {c}{2}| 1\right )}{d \sec \left (\frac {d x}{2}+\frac {c}{2}\right ) \sqrt {a \left (\cos ^{2}\left (\frac {d x}{2}+\frac {c}{2}\right )\right )}\, \operatorname {csgn}\left (\cos \left (\frac {d x}{2}+\frac {c}{2}\right )\right )}\) | \(56\) |
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none
Time = 0.28 (sec) , antiderivative size = 126, normalized size of antiderivative = 2.74 \[ \int \frac {1}{\sqrt {a+a \cos (c+d x)}} \, dx=\left [\frac {\sqrt {2} \log \left (-\frac {\cos \left (d x + c\right )^{2} - \frac {2 \, \sqrt {2} \sqrt {a \cos \left (d x + c\right ) + a} \sin \left (d x + c\right )}{\sqrt {a}} - 2 \, \cos \left (d x + c\right ) - 3}{\cos \left (d x + c\right )^{2} + 2 \, \cos \left (d x + c\right ) + 1}\right )}{2 \, \sqrt {a} d}, -\frac {\sqrt {2} \sqrt {-\frac {1}{a}} \arctan \left (\frac {\sqrt {2} \sqrt {a \cos \left (d x + c\right ) + a} \sqrt {-\frac {1}{a}}}{\sin \left (d x + c\right )}\right )}{d}\right ] \]
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\[ \int \frac {1}{\sqrt {a+a \cos (c+d x)}} \, dx=\int \frac {1}{\sqrt {a \cos {\left (c + d x \right )} + a}}\, dx \]
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Leaf count of result is larger than twice the leaf count of optimal. 90 vs. \(2 (37) = 74\).
Time = 0.43 (sec) , antiderivative size = 90, normalized size of antiderivative = 1.96 \[ \int \frac {1}{\sqrt {a+a \cos (c+d x)}} \, dx=\frac {\sqrt {2} \log \left (\cos \left (\frac {1}{2} \, d x + \frac {1}{2} \, c\right )^{2} + \sin \left (\frac {1}{2} \, d x + \frac {1}{2} \, c\right )^{2} + 2 \, \sin \left (\frac {1}{2} \, d x + \frac {1}{2} \, c\right ) + 1\right ) - \sqrt {2} \log \left (\cos \left (\frac {1}{2} \, d x + \frac {1}{2} \, c\right )^{2} + \sin \left (\frac {1}{2} \, d x + \frac {1}{2} \, c\right )^{2} - 2 \, \sin \left (\frac {1}{2} \, d x + \frac {1}{2} \, c\right ) + 1\right )}{2 \, \sqrt {a} d} \]
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Leaf count of result is larger than twice the leaf count of optimal. 93 vs. \(2 (37) = 74\).
Time = 0.28 (sec) , antiderivative size = 93, normalized size of antiderivative = 2.02 \[ \int \frac {1}{\sqrt {a+a \cos (c+d x)}} \, dx=\frac {\frac {\sqrt {2} \log \left ({\left | \frac {1}{\sin \left (\frac {1}{2} \, d x + \frac {1}{2} \, c\right )} + \sin \left (\frac {1}{2} \, d x + \frac {1}{2} \, c\right ) + 2 \right |}\right )}{\sqrt {a} \mathrm {sgn}\left (\cos \left (\frac {1}{2} \, d x + \frac {1}{2} \, c\right )\right )} - \frac {\sqrt {2} \log \left ({\left | \frac {1}{\sin \left (\frac {1}{2} \, d x + \frac {1}{2} \, c\right )} + \sin \left (\frac {1}{2} \, d x + \frac {1}{2} \, c\right ) - 2 \right |}\right )}{\sqrt {a} \mathrm {sgn}\left (\cos \left (\frac {1}{2} \, d x + \frac {1}{2} \, c\right )\right )}}{4 \, d} \]
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Time = 0.00 (sec) , antiderivative size = 45, normalized size of antiderivative = 0.98 \[ \int \frac {1}{\sqrt {a+a \cos (c+d x)}} \, dx=\frac {\mathrm {F}\left (\frac {c}{2}+\frac {d\,x}{2}\middle |1\right )\,\sqrt {\frac {2\,\left (a+a\,\cos \left (c+d\,x\right )\right )}{a}}}{d\,\sqrt {a+a\,\cos \left (c+d\,x\right )}} \]
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