Integrand size = 18, antiderivative size = 31 \[ \int \sin (a+b x) \sin ^2(2 a+2 b x) \, dx=-\frac {4 \cos ^3(a+b x)}{3 b}+\frac {4 \cos ^5(a+b x)}{5 b} \]
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Time = 0.06 (sec) , antiderivative size = 31, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.167, Rules used = {4373, 2645, 14} \[ \int \sin (a+b x) \sin ^2(2 a+2 b x) \, dx=\frac {4 \cos ^5(a+b x)}{5 b}-\frac {4 \cos ^3(a+b x)}{3 b} \]
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Rule 14
Rule 2645
Rule 4373
Rubi steps \begin{align*} \text {integral}& = 4 \int \cos ^2(a+b x) \sin ^3(a+b x) \, dx \\ & = -\frac {4 \text {Subst}\left (\int x^2 \left (1-x^2\right ) \, dx,x,\cos (a+b x)\right )}{b} \\ & = -\frac {4 \text {Subst}\left (\int \left (x^2-x^4\right ) \, dx,x,\cos (a+b x)\right )}{b} \\ & = -\frac {4 \cos ^3(a+b x)}{3 b}+\frac {4 \cos ^5(a+b x)}{5 b} \\ \end{align*}
Time = 0.06 (sec) , antiderivative size = 27, normalized size of antiderivative = 0.87 \[ \int \sin (a+b x) \sin ^2(2 a+2 b x) \, dx=\frac {2 \cos ^3(a+b x) (-7+3 \cos (2 (a+b x)))}{15 b} \]
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Time = 0.54 (sec) , antiderivative size = 41, normalized size of antiderivative = 1.32
method | result | size |
default | \(-\frac {\cos \left (x b +a \right )}{2 b}-\frac {\cos \left (3 x b +3 a \right )}{12 b}+\frac {\cos \left (5 x b +5 a \right )}{20 b}\) | \(41\) |
risch | \(-\frac {\cos \left (x b +a \right )}{2 b}-\frac {\cos \left (3 x b +3 a \right )}{12 b}+\frac {\cos \left (5 x b +5 a \right )}{20 b}\) | \(41\) |
parallelrisch | \(\frac {\frac {4 \left (4 \tan \left (x b +a \right )^{4}+7 \tan \left (x b +a \right )^{2}+4\right ) \tan \left (\frac {a}{2}+\frac {x b}{2}\right )^{2}}{15}+\frac {16 \left (\tan \left (x b +a \right )^{3}-\tan \left (x b +a \right )\right ) \tan \left (\frac {a}{2}+\frac {x b}{2}\right )}{15}+\frac {4 \tan \left (x b +a \right )^{2}}{15}}{b \left (1+\tan \left (\frac {a}{2}+\frac {x b}{2}\right )^{2}\right ) \left (1+\tan \left (x b +a \right )^{2}\right )^{2}}\) | \(104\) |
norman | \(\frac {-\frac {16}{15 b}-\frac {16 \tan \left (\frac {a}{2}+\frac {x b}{2}\right ) \tan \left (x b +a \right )}{15 b}+\frac {16 \tan \left (\frac {a}{2}+\frac {x b}{2}\right ) \tan \left (x b +a \right )^{3}}{15 b}-\frac {16 \tan \left (x b +a \right )^{4}}{15 b}-\frac {28 \tan \left (x b +a \right )^{2}}{15 b}-\frac {4 \tan \left (\frac {a}{2}+\frac {x b}{2}\right )^{2} \tan \left (x b +a \right )^{2}}{15 b}}{\left (1+\tan \left (\frac {a}{2}+\frac {x b}{2}\right )^{2}\right ) \left (1+\tan \left (x b +a \right )^{2}\right )^{2}}\) | \(127\) |
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Time = 0.25 (sec) , antiderivative size = 26, normalized size of antiderivative = 0.84 \[ \int \sin (a+b x) \sin ^2(2 a+2 b x) \, dx=\frac {4 \, {\left (3 \, \cos \left (b x + a\right )^{5} - 5 \, \cos \left (b x + a\right )^{3}\right )}}{15 \, b} \]
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Leaf count of result is larger than twice the leaf count of optimal. 92 vs. \(2 (26) = 52\).
Time = 0.36 (sec) , antiderivative size = 92, normalized size of antiderivative = 2.97 \[ \int \sin (a+b x) \sin ^2(2 a+2 b x) \, dx=\begin {cases} - \frac {4 \sin {\left (a + b x \right )} \sin {\left (2 a + 2 b x \right )} \cos {\left (2 a + 2 b x \right )}}{15 b} - \frac {7 \sin ^{2}{\left (2 a + 2 b x \right )} \cos {\left (a + b x \right )}}{15 b} - \frac {8 \cos {\left (a + b x \right )} \cos ^{2}{\left (2 a + 2 b x \right )}}{15 b} & \text {for}\: b \neq 0 \\x \sin {\left (a \right )} \sin ^{2}{\left (2 a \right )} & \text {otherwise} \end {cases} \]
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Time = 0.20 (sec) , antiderivative size = 36, normalized size of antiderivative = 1.16 \[ \int \sin (a+b x) \sin ^2(2 a+2 b x) \, dx=\frac {3 \, \cos \left (5 \, b x + 5 \, a\right ) - 5 \, \cos \left (3 \, b x + 3 \, a\right ) - 30 \, \cos \left (b x + a\right )}{60 \, b} \]
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Time = 0.30 (sec) , antiderivative size = 36, normalized size of antiderivative = 1.16 \[ \int \sin (a+b x) \sin ^2(2 a+2 b x) \, dx=\frac {3 \, \cos \left (5 \, b x + 5 \, a\right ) - 5 \, \cos \left (3 \, b x + 3 \, a\right ) - 30 \, \cos \left (b x + a\right )}{60 \, b} \]
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Time = 0.06 (sec) , antiderivative size = 26, normalized size of antiderivative = 0.84 \[ \int \sin (a+b x) \sin ^2(2 a+2 b x) \, dx=-\frac {4\,\left (5\,{\cos \left (a+b\,x\right )}^3-3\,{\cos \left (a+b\,x\right )}^5\right )}{15\,b} \]
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