Integrand size = 9, antiderivative size = 17 \[ \int \cos (3 x) \cos (5 x) \, dx=\frac {1}{4} \sin (2 x)+\frac {1}{16} \sin (8 x) \]
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Time = 0.01 (sec) , antiderivative size = 17, normalized size of antiderivative = 1.00, number of steps used = 1, number of rules used = 1, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.111, Rules used = {4368} \[ \int \cos (3 x) \cos (5 x) \, dx=\frac {1}{4} \sin (2 x)+\frac {1}{16} \sin (8 x) \]
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Rule 4368
Rubi steps \begin{align*} \text {integral}& = \frac {1}{4} \sin (2 x)+\frac {1}{16} \sin (8 x) \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 17, normalized size of antiderivative = 1.00 \[ \int \cos (3 x) \cos (5 x) \, dx=\frac {1}{4} \sin (2 x)+\frac {1}{16} \sin (8 x) \]
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Time = 0.27 (sec) , antiderivative size = 14, normalized size of antiderivative = 0.82
method | result | size |
default | \(\frac {\sin \left (2 x \right )}{4}+\frac {\sin \left (8 x \right )}{16}\) | \(14\) |
risch | \(\frac {\sin \left (2 x \right )}{4}+\frac {\sin \left (8 x \right )}{16}\) | \(14\) |
parallelrisch | \(\frac {\sin \left (2 x \right )}{4}+\frac {\sin \left (8 x \right )}{16}\) | \(14\) |
norman | \(\frac {\frac {3 \tan \left (\frac {3 x}{2}\right ) \left (\tan ^{2}\left (\frac {5 x}{2}\right )\right )}{8}-\frac {5 \left (\tan ^{2}\left (\frac {3 x}{2}\right )\right ) \tan \left (\frac {5 x}{2}\right )}{8}-\frac {3 \tan \left (\frac {3 x}{2}\right )}{8}+\frac {5 \tan \left (\frac {5 x}{2}\right )}{8}}{\left (1+\tan ^{2}\left (\frac {3 x}{2}\right )\right ) \left (1+\tan ^{2}\left (\frac {5 x}{2}\right )\right )}\) | \(59\) |
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none
Time = 0.25 (sec) , antiderivative size = 22, normalized size of antiderivative = 1.29 \[ \int \cos (3 x) \cos (5 x) \, dx={\left (8 \, \cos \left (x\right )^{7} - 12 \, \cos \left (x\right )^{5} + 5 \, \cos \left (x\right )^{3}\right )} \sin \left (x\right ) \]
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Leaf count of result is larger than twice the leaf count of optimal. 26 vs. \(2 (12) = 24\).
Time = 0.14 (sec) , antiderivative size = 26, normalized size of antiderivative = 1.53 \[ \int \cos (3 x) \cos (5 x) \, dx=- \frac {3 \sin {\left (3 x \right )} \cos {\left (5 x \right )}}{16} + \frac {5 \sin {\left (5 x \right )} \cos {\left (3 x \right )}}{16} \]
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none
Time = 0.20 (sec) , antiderivative size = 13, normalized size of antiderivative = 0.76 \[ \int \cos (3 x) \cos (5 x) \, dx=\frac {1}{16} \, \sin \left (8 \, x\right ) + \frac {1}{4} \, \sin \left (2 \, x\right ) \]
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none
Time = 0.32 (sec) , antiderivative size = 13, normalized size of antiderivative = 0.76 \[ \int \cos (3 x) \cos (5 x) \, dx=\frac {1}{16} \, \sin \left (8 \, x\right ) + \frac {1}{4} \, \sin \left (2 \, x\right ) \]
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Time = 0.07 (sec) , antiderivative size = 13, normalized size of antiderivative = 0.76 \[ \int \cos (3 x) \cos (5 x) \, dx=\frac {\sin \left (2\,x\right )}{4}+\frac {\sin \left (8\,x\right )}{16} \]
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