Optimal. Leaf size=62 \[ \frac{\text{CosIntegral}(b x) \sin (b x)}{b^2}-\frac{\text{Si}(2 b x)}{2 b^2}+\frac{\sin (b x) \cos (b x)}{2 b^2}-\frac{x \text{CosIntegral}(b x) \cos (b x)}{b}+\frac{x}{2 b} \]
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Rubi [A] time = 0.0691263, antiderivative size = 62, normalized size of antiderivative = 1., number of steps used = 9, number of rules used = 7, integrand size = 10, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.7, Rules used = {6520, 12, 2635, 8, 6512, 4406, 3299} \[ \frac{\text{CosIntegral}(b x) \sin (b x)}{b^2}-\frac{\text{Si}(2 b x)}{2 b^2}+\frac{\sin (b x) \cos (b x)}{2 b^2}-\frac{x \text{CosIntegral}(b x) \cos (b x)}{b}+\frac{x}{2 b} \]
Antiderivative was successfully verified.
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Rule 6520
Rule 12
Rule 2635
Rule 8
Rule 6512
Rule 4406
Rule 3299
Rubi steps
\begin{align*} \int x \text{Ci}(b x) \sin (b x) \, dx &=-\frac{x \cos (b x) \text{Ci}(b x)}{b}+\frac{\int \cos (b x) \text{Ci}(b x) \, dx}{b}+\int \frac{\cos ^2(b x)}{b} \, dx\\ &=-\frac{x \cos (b x) \text{Ci}(b x)}{b}+\frac{\text{Ci}(b x) \sin (b x)}{b^2}+\frac{\int \cos ^2(b x) \, dx}{b}-\frac{\int \frac{\cos (b x) \sin (b x)}{b x} \, dx}{b}\\ &=-\frac{x \cos (b x) \text{Ci}(b x)}{b}+\frac{\cos (b x) \sin (b x)}{2 b^2}+\frac{\text{Ci}(b x) \sin (b x)}{b^2}-\frac{\int \frac{\cos (b x) \sin (b x)}{x} \, dx}{b^2}+\frac{\int 1 \, dx}{2 b}\\ &=\frac{x}{2 b}-\frac{x \cos (b x) \text{Ci}(b x)}{b}+\frac{\cos (b x) \sin (b x)}{2 b^2}+\frac{\text{Ci}(b x) \sin (b x)}{b^2}-\frac{\int \frac{\sin (2 b x)}{2 x} \, dx}{b^2}\\ &=\frac{x}{2 b}-\frac{x \cos (b x) \text{Ci}(b x)}{b}+\frac{\cos (b x) \sin (b x)}{2 b^2}+\frac{\text{Ci}(b x) \sin (b x)}{b^2}-\frac{\int \frac{\sin (2 b x)}{x} \, dx}{2 b^2}\\ &=\frac{x}{2 b}-\frac{x \cos (b x) \text{Ci}(b x)}{b}+\frac{\cos (b x) \sin (b x)}{2 b^2}+\frac{\text{Ci}(b x) \sin (b x)}{b^2}-\frac{\text{Si}(2 b x)}{2 b^2}\\ \end{align*}
Mathematica [A] time = 0.0504018, size = 44, normalized size = 0.71 \[ \frac{\text{CosIntegral}(b x) (4 \sin (b x)-4 b x \cos (b x))-2 \text{Si}(2 b x)+2 b x+\sin (2 b x)}{4 b^2} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.057, size = 45, normalized size = 0.7 \begin{align*}{\frac{1}{{b}^{2}} \left ({\it Ci} \left ( bx \right ) \left ( -bx\cos \left ( bx \right ) +\sin \left ( bx \right ) \right ) +{\frac{\sin \left ( bx \right ) \cos \left ( bx \right ) }{2}}+{\frac{bx}{2}}-{\frac{{\it Si} \left ( 2\,bx \right ) }{2}} \right ) } \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int x{\rm Ci}\left (b x\right ) \sin \left (b x\right )\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [F] time = 0., size = 0, normalized size = 0. \begin{align*}{\rm integral}\left (x \operatorname{Ci}\left (b x\right ) \sin \left (b x\right ), x\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int x \sin{\left (b x \right )} \operatorname{Ci}{\left (b x \right )}\, dx \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [C] time = 1.17779, size = 77, normalized size = 1.24 \begin{align*} -{\left (\frac{x \cos \left (b x\right )}{b} - \frac{\sin \left (b x\right )}{b^{2}}\right )} \operatorname{Ci}\left (b x\right ) + \frac{2 \, b x - \Im \left ( \operatorname{Ci}\left (2 \, b x\right ) \right ) + \Im \left ( \operatorname{Ci}\left (-2 \, b x\right ) \right ) - 2 \, \operatorname{Si}\left (2 \, b x\right )}{4 \, b^{2}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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