Optimal. Leaf size=47 \[ -\frac{b \sin (a) \text{CosIntegral}\left (b x^n\right )}{n}-\frac{b \cos (a) \text{Si}\left (b x^n\right )}{n}-\frac{x^{-n} \cos \left (a+b x^n\right )}{n} \]
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Rubi [A] time = 0.0864871, antiderivative size = 47, normalized size of antiderivative = 1., number of steps used = 5, number of rules used = 5, integrand size = 16, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.312, Rules used = {3380, 3297, 3303, 3299, 3302} \[ -\frac{b \sin (a) \text{CosIntegral}\left (b x^n\right )}{n}-\frac{b \cos (a) \text{Si}\left (b x^n\right )}{n}-\frac{x^{-n} \cos \left (a+b x^n\right )}{n} \]
Antiderivative was successfully verified.
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Rule 3380
Rule 3297
Rule 3303
Rule 3299
Rule 3302
Rubi steps
\begin{align*} \int x^{-1-n} \cos \left (a+b x^n\right ) \, dx &=\frac{\operatorname{Subst}\left (\int \frac{\cos (a+b x)}{x^2} \, dx,x,x^n\right )}{n}\\ &=-\frac{x^{-n} \cos \left (a+b x^n\right )}{n}-\frac{b \operatorname{Subst}\left (\int \frac{\sin (a+b x)}{x} \, dx,x,x^n\right )}{n}\\ &=-\frac{x^{-n} \cos \left (a+b x^n\right )}{n}-\frac{(b \cos (a)) \operatorname{Subst}\left (\int \frac{\sin (b x)}{x} \, dx,x,x^n\right )}{n}-\frac{(b \sin (a)) \operatorname{Subst}\left (\int \frac{\cos (b x)}{x} \, dx,x,x^n\right )}{n}\\ &=-\frac{x^{-n} \cos \left (a+b x^n\right )}{n}-\frac{b \text{Ci}\left (b x^n\right ) \sin (a)}{n}-\frac{b \cos (a) \text{Si}\left (b x^n\right )}{n}\\ \end{align*}
Mathematica [A] time = 0.0938222, size = 45, normalized size = 0.96 \[ -\frac{x^{-n} \left (b \sin (a) x^n \text{CosIntegral}\left (b x^n\right )+b \cos (a) x^n \text{Si}\left (b x^n\right )+\cos \left (a+b x^n\right )\right )}{n} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.036, size = 45, normalized size = 1. \begin{align*}{\frac{b}{n} \left ( -{\frac{\cos \left ( a+b{x}^{n} \right ) }{b{x}^{n}}}-{\it Si} \left ( b{x}^{n} \right ) \cos \left ( a \right ) -{\it Ci} \left ( b{x}^{n} \right ) \sin \left ( a \right ) \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^{-n - 1} \cos \left (b x^{n} + a\right )\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.66697, size = 190, normalized size = 4.04 \begin{align*} -\frac{b x^{n} \operatorname{Ci}\left (b x^{n}\right ) \sin \left (a\right ) + b x^{n} \operatorname{Ci}\left (-b x^{n}\right ) \sin \left (a\right ) + 2 \, b x^{n} \cos \left (a\right ) \operatorname{Si}\left (b x^{n}\right ) + 2 \, \cos \left (b x^{n} + a\right )}{2 \, n x^{n}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F(-1)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Timed out} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int x^{-n - 1} \cos \left (b x^{n} + a\right )\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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