Integrand size = 9, antiderivative size = 17 \[ \int \sin (3 x) \sin (6 x) \, dx=\frac {1}{6} \sin (3 x)-\frac {1}{18} \sin (9 x) \]
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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 = {4367} \[ \int \sin (3 x) \sin (6 x) \, dx=\frac {1}{6} \sin (3 x)-\frac {1}{18} \sin (9 x) \]
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Rule 4367
Rubi steps \begin{align*} \text {integral}& = \frac {1}{6} \sin (3 x)-\frac {1}{18} \sin (9 x) \\ \end{align*}
Time = 0.03 (sec) , antiderivative size = 17, normalized size of antiderivative = 1.00 \[ \int \sin (3 x) \sin (6 x) \, dx=\frac {1}{6} \sin (3 x)-\frac {1}{18} \sin (9 x) \]
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Time = 0.18 (sec) , antiderivative size = 9, normalized size of antiderivative = 0.53
method | result | size |
derivativedivides | \(\frac {2 \left (\sin ^{3}\left (3 x \right )\right )}{9}\) | \(9\) |
default | \(\frac {2 \left (\sin ^{3}\left (3 x \right )\right )}{9}\) | \(9\) |
risch | \(\frac {\sin \left (3 x \right )}{6}-\frac {\sin \left (9 x \right )}{18}\) | \(14\) |
parallelrisch | \(\frac {\sin \left (3 x \right )}{6}-\frac {\sin \left (9 x \right )}{18}\) | \(14\) |
norman | \(\frac {-\frac {2 \tan \left (3 x \right ) \left (\tan ^{2}\left (\frac {3 x}{2}\right )\right )}{9}+\frac {4 \left (\tan ^{2}\left (3 x \right )\right ) \tan \left (\frac {3 x}{2}\right )}{9}+\frac {2 \tan \left (3 x \right )}{9}-\frac {4 \tan \left (\frac {3 x}{2}\right )}{9}}{\left (1+\tan ^{2}\left (\frac {3 x}{2}\right )\right ) \left (1+\tan ^{2}\left (3 x \right )\right )}\) | \(59\) |
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none
Time = 0.26 (sec) , antiderivative size = 14, normalized size of antiderivative = 0.82 \[ \int \sin (3 x) \sin (6 x) \, dx=-\frac {2}{9} \, {\left (\cos \left (3 \, x\right )^{2} - 1\right )} \sin \left (3 \, x\right ) \]
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Time = 0.13 (sec) , antiderivative size = 24, normalized size of antiderivative = 1.41 \[ \int \sin (3 x) \sin (6 x) \, dx=- \frac {2 \sin {\left (3 x \right )} \cos {\left (6 x \right )}}{9} + \frac {\sin {\left (6 x \right )} \cos {\left (3 x \right )}}{9} \]
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none
Time = 0.18 (sec) , antiderivative size = 13, normalized size of antiderivative = 0.76 \[ \int \sin (3 x) \sin (6 x) \, dx=-\frac {1}{18} \, \sin \left (9 \, x\right ) + \frac {1}{6} \, \sin \left (3 \, x\right ) \]
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none
Time = 0.27 (sec) , antiderivative size = 8, normalized size of antiderivative = 0.47 \[ \int \sin (3 x) \sin (6 x) \, dx=\frac {2}{9} \, \sin \left (3 \, x\right )^{3} \]
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Time = 0.07 (sec) , antiderivative size = 13, normalized size of antiderivative = 0.76 \[ \int \sin (3 x) \sin (6 x) \, dx=\frac {\sin \left (3\,x\right )}{6}-\frac {\sin \left (9\,x\right )}{18} \]
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