Integrand size = 12, antiderivative size = 25 \[ \int \frac {\cos \left (a+\frac {b}{x^2}\right )}{x} \, dx=-\frac {1}{2} \cos (a) \operatorname {CosIntegral}\left (\frac {b}{x^2}\right )+\frac {1}{2} \sin (a) \text {Si}\left (\frac {b}{x^2}\right ) \]
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Time = 0.03 (sec) , antiderivative size = 25, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.250, Rules used = {3459, 3457, 3456} \[ \int \frac {\cos \left (a+\frac {b}{x^2}\right )}{x} \, dx=\frac {1}{2} \sin (a) \text {Si}\left (\frac {b}{x^2}\right )-\frac {1}{2} \cos (a) \operatorname {CosIntegral}\left (\frac {b}{x^2}\right ) \]
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Rule 3456
Rule 3457
Rule 3459
Rubi steps \begin{align*} \text {integral}& = \cos (a) \int \frac {\cos \left (\frac {b}{x^2}\right )}{x} \, dx-\sin (a) \int \frac {\sin \left (\frac {b}{x^2}\right )}{x} \, dx \\ & = -\frac {1}{2} \cos (a) \operatorname {CosIntegral}\left (\frac {b}{x^2}\right )+\frac {1}{2} \sin (a) \text {Si}\left (\frac {b}{x^2}\right ) \\ \end{align*}
Time = 0.05 (sec) , antiderivative size = 24, normalized size of antiderivative = 0.96 \[ \int \frac {\cos \left (a+\frac {b}{x^2}\right )}{x} \, dx=\frac {1}{2} \left (-\cos (a) \operatorname {CosIntegral}\left (\frac {b}{x^2}\right )+\sin (a) \text {Si}\left (\frac {b}{x^2}\right )\right ) \]
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Time = 0.50 (sec) , antiderivative size = 22, normalized size of antiderivative = 0.88
method | result | size |
derivativedivides | \(-\frac {\operatorname {Ci}\left (\frac {b}{x^{2}}\right ) \cos \left (a \right )}{2}+\frac {\operatorname {Si}\left (\frac {b}{x^{2}}\right ) \sin \left (a \right )}{2}\) | \(22\) |
default | \(-\frac {\operatorname {Ci}\left (\frac {b}{x^{2}}\right ) \cos \left (a \right )}{2}+\frac {\operatorname {Si}\left (\frac {b}{x^{2}}\right ) \sin \left (a \right )}{2}\) | \(22\) |
risch | \(-\frac {i {\mathrm e}^{-i a} \operatorname {csgn}\left (\frac {b}{x^{2}}\right ) \pi }{4}+\frac {i {\mathrm e}^{-i a} \operatorname {Si}\left (\frac {b}{x^{2}}\right )}{2}+\frac {{\mathrm e}^{-i a} \operatorname {Ei}_{1}\left (-\frac {i b}{x^{2}}\right )}{4}+\frac {{\mathrm e}^{i a} \operatorname {Ei}_{1}\left (-\frac {i b}{x^{2}}\right )}{4}\) | \(63\) |
meijerg | \(-\frac {\sqrt {\pi }\, \cos \left (a \right ) \left (\frac {2 \gamma -4 \ln \left (x \right )+\ln \left (b^{2}\right )}{\sqrt {\pi }}-\frac {2 \gamma }{\sqrt {\pi }}-\frac {2 \ln \left (2\right )}{\sqrt {\pi }}-\frac {2 \ln \left (\frac {b}{2 x^{2}}\right )}{\sqrt {\pi }}+\frac {2 \,\operatorname {Ci}\left (\frac {b}{x^{2}}\right )}{\sqrt {\pi }}\right )}{4}+\frac {\operatorname {Si}\left (\frac {b}{x^{2}}\right ) \sin \left (a \right )}{2}\) | \(72\) |
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none
Time = 0.25 (sec) , antiderivative size = 21, normalized size of antiderivative = 0.84 \[ \int \frac {\cos \left (a+\frac {b}{x^2}\right )}{x} \, dx=-\frac {1}{2} \, \cos \left (a\right ) \operatorname {Ci}\left (\frac {b}{x^{2}}\right ) + \frac {1}{2} \, \sin \left (a\right ) \operatorname {Si}\left (\frac {b}{x^{2}}\right ) \]
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\[ \int \frac {\cos \left (a+\frac {b}{x^2}\right )}{x} \, dx=\int \frac {\cos {\left (a + \frac {b}{x^{2}} \right )}}{x}\, dx \]
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Result contains complex when optimal does not.
Time = 0.31 (sec) , antiderivative size = 43, normalized size of antiderivative = 1.72 \[ \int \frac {\cos \left (a+\frac {b}{x^2}\right )}{x} \, dx=-\frac {1}{4} \, {\left ({\rm Ei}\left (\frac {i \, b}{x^{2}}\right ) + {\rm Ei}\left (-\frac {i \, b}{x^{2}}\right )\right )} \cos \left (a\right ) - \frac {1}{4} \, {\left (i \, {\rm Ei}\left (\frac {i \, b}{x^{2}}\right ) - i \, {\rm Ei}\left (-\frac {i \, b}{x^{2}}\right )\right )} \sin \left (a\right ) \]
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\[ \int \frac {\cos \left (a+\frac {b}{x^2}\right )}{x} \, dx=\int { \frac {\cos \left (a + \frac {b}{x^{2}}\right )}{x} \,d x } \]
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Timed out. \[ \int \frac {\cos \left (a+\frac {b}{x^2}\right )}{x} \, dx=\frac {\sin \left (a\right )\,\mathrm {sinint}\left (\frac {b}{x^2}\right )}{2}-\frac {\cos \left (a\right )\,\mathrm {cosint}\left (\frac {b}{x^2}\right )}{2} \]
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