3.98 \(\int x^2 \cos (x) \, dx\)

Optimal. Leaf size=16 \[ x^2 \sin (x)-2 \sin (x)+2 x \cos (x) \]

[Out]

2*x*Cos[x] - 2*Sin[x] + x^2*Sin[x]

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Rubi [A]  time = 0.0212841, antiderivative size = 16, normalized size of antiderivative = 1., number of steps used = 3, number of rules used = 2, integrand size = 6, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.333, Rules used = {3296, 2637} \[ x^2 \sin (x)-2 \sin (x)+2 x \cos (x) \]

Antiderivative was successfully verified.

[In]

Int[x^2*Cos[x],x]

[Out]

2*x*Cos[x] - 2*Sin[x] + x^2*Sin[x]

Rule 3296

Int[((c_.) + (d_.)*(x_))^(m_.)*sin[(e_.) + (f_.)*(x_)], x_Symbol] :> -Simp[((c + d*x)^m*Cos[e + f*x])/f, x] +
Dist[(d*m)/f, Int[(c + d*x)^(m - 1)*Cos[e + f*x], x], x] /; FreeQ[{c, d, e, f}, x] && GtQ[m, 0]

Rule 2637

Int[sin[Pi/2 + (c_.) + (d_.)*(x_)], x_Symbol] :> Simp[Sin[c + d*x]/d, x] /; FreeQ[{c, d}, x]

Rubi steps

\begin{align*} \int x^2 \cos (x) \, dx &=x^2 \sin (x)-2 \int x \sin (x) \, dx\\ &=2 x \cos (x)+x^2 \sin (x)-2 \int \cos (x) \, dx\\ &=2 x \cos (x)-2 \sin (x)+x^2 \sin (x)\\ \end{align*}

Mathematica [A]  time = 0.012978, size = 14, normalized size = 0.88 \[ \left (x^2-2\right ) \sin (x)+2 x \cos (x) \]

Antiderivative was successfully verified.

[In]

Integrate[x^2*Cos[x],x]

[Out]

2*x*Cos[x] + (-2 + x^2)*Sin[x]

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Maple [A]  time = 0.001, size = 17, normalized size = 1.1 \begin{align*} 2\,x\cos \left ( x \right ) -2\,\sin \left ( x \right ) +{x}^{2}\sin \left ( x \right ) \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x^2*cos(x),x)

[Out]

2*x*cos(x)-2*sin(x)+x^2*sin(x)

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Maxima [A]  time = 0.947238, size = 19, normalized size = 1.19 \begin{align*} 2 \, x \cos \left (x\right ) +{\left (x^{2} - 2\right )} \sin \left (x\right ) \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^2*cos(x),x, algorithm="maxima")

[Out]

2*x*cos(x) + (x^2 - 2)*sin(x)

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Fricas [A]  time = 1.68208, size = 42, normalized size = 2.62 \begin{align*} 2 \, x \cos \left (x\right ) +{\left (x^{2} - 2\right )} \sin \left (x\right ) \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^2*cos(x),x, algorithm="fricas")

[Out]

2*x*cos(x) + (x^2 - 2)*sin(x)

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Sympy [A]  time = 0.318554, size = 17, normalized size = 1.06 \begin{align*} x^{2} \sin{\left (x \right )} + 2 x \cos{\left (x \right )} - 2 \sin{\left (x \right )} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x**2*cos(x),x)

[Out]

x**2*sin(x) + 2*x*cos(x) - 2*sin(x)

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Giac [A]  time = 1.08699, size = 19, normalized size = 1.19 \begin{align*} 2 \, x \cos \left (x\right ) +{\left (x^{2} - 2\right )} \sin \left (x\right ) \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^2*cos(x),x, algorithm="giac")

[Out]

2*x*cos(x) + (x^2 - 2)*sin(x)