3.1 \(\int x^5 \cot ^{-1}(a x) \, dx\)

Optimal. Leaf size=51 \[ -\frac {\tan ^{-1}(a x)}{6 a^6}+\frac {x}{6 a^5}-\frac {x^3}{18 a^3}+\frac {1}{6} x^6 \cot ^{-1}(a x)+\frac {x^5}{30 a} \]

[Out]

1/6*x/a^5-1/18*x^3/a^3+1/30*x^5/a+1/6*x^6*arccot(a*x)-1/6*arctan(a*x)/a^6

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Rubi [A]  time = 0.03, antiderivative size = 51, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 3, integrand size = 8, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.375, Rules used = {4853, 302, 203} \[ -\frac {x^3}{18 a^3}+\frac {x}{6 a^5}-\frac {\tan ^{-1}(a x)}{6 a^6}+\frac {x^5}{30 a}+\frac {1}{6} x^6 \cot ^{-1}(a x) \]

Antiderivative was successfully verified.

[In]

Int[x^5*ArcCot[a*x],x]

[Out]

x/(6*a^5) - x^3/(18*a^3) + x^5/(30*a) + (x^6*ArcCot[a*x])/6 - ArcTan[a*x]/(6*a^6)

Rule 203

Int[((a_) + (b_.)*(x_)^2)^(-1), x_Symbol] :> Simp[(1*ArcTan[(Rt[b, 2]*x)/Rt[a, 2]])/(Rt[a, 2]*Rt[b, 2]), x] /;
FreeQ[{a, b}, x] && PosQ[a/b] && (GtQ[a, 0] || GtQ[b, 0])

Rule 302

Int[(x_)^(m_)/((a_) + (b_.)*(x_)^(n_)), x_Symbol] :> Int[PolynomialDivide[x^m, a + b*x^n, x], x] /; FreeQ[{a,
b}, x] && IGtQ[m, 0] && IGtQ[n, 0] && GtQ[m, 2*n - 1]

Rule 4853

Int[((a_.) + ArcCot[(c_.)*(x_)]*(b_.))^(p_.)*((d_.)*(x_))^(m_.), x_Symbol] :> Simp[((d*x)^(m + 1)*(a + b*ArcCo
t[c*x])^p)/(d*(m + 1)), x] + Dist[(b*c*p)/(d*(m + 1)), Int[((d*x)^(m + 1)*(a + b*ArcCot[c*x])^(p - 1))/(1 + c^
2*x^2), x], x] /; FreeQ[{a, b, c, d, m}, x] && IGtQ[p, 0] && (EqQ[p, 1] || IntegerQ[m]) && NeQ[m, -1]

Rubi steps

\begin {align*} \int x^5 \cot ^{-1}(a x) \, dx &=\frac {1}{6} x^6 \cot ^{-1}(a x)+\frac {1}{6} a \int \frac {x^6}{1+a^2 x^2} \, dx\\ &=\frac {1}{6} x^6 \cot ^{-1}(a x)+\frac {1}{6} a \int \left (\frac {1}{a^6}-\frac {x^2}{a^4}+\frac {x^4}{a^2}-\frac {1}{a^6 \left (1+a^2 x^2\right )}\right ) \, dx\\ &=\frac {x}{6 a^5}-\frac {x^3}{18 a^3}+\frac {x^5}{30 a}+\frac {1}{6} x^6 \cot ^{-1}(a x)-\frac {\int \frac {1}{1+a^2 x^2} \, dx}{6 a^5}\\ &=\frac {x}{6 a^5}-\frac {x^3}{18 a^3}+\frac {x^5}{30 a}+\frac {1}{6} x^6 \cot ^{-1}(a x)-\frac {\tan ^{-1}(a x)}{6 a^6}\\ \end {align*}

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Mathematica [A]  time = 0.00, size = 51, normalized size = 1.00 \[ -\frac {\tan ^{-1}(a x)}{6 a^6}+\frac {x}{6 a^5}-\frac {x^3}{18 a^3}+\frac {1}{6} x^6 \cot ^{-1}(a x)+\frac {x^5}{30 a} \]

Antiderivative was successfully verified.

[In]

Integrate[x^5*ArcCot[a*x],x]

[Out]

x/(6*a^5) - x^3/(18*a^3) + x^5/(30*a) + (x^6*ArcCot[a*x])/6 - ArcTan[a*x]/(6*a^6)

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fricas [A]  time = 0.91, size = 41, normalized size = 0.80 \[ \frac {3 \, a^{5} x^{5} - 5 \, a^{3} x^{3} + 15 \, a x + 15 \, {\left (a^{6} x^{6} + 1\right )} \operatorname {arccot}\left (a x\right )}{90 \, a^{6}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^5*arccot(a*x),x, algorithm="fricas")

[Out]

1/90*(3*a^5*x^5 - 5*a^3*x^3 + 15*a*x + 15*(a^6*x^6 + 1)*arccot(a*x))/a^6

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giac [A]  time = 0.13, size = 59, normalized size = 1.16 \[ \frac {1}{90} \, {\left (\frac {15 \, x^{6} \arctan \left (\frac {1}{a x}\right )}{a} - \frac {x^{5} {\left (\frac {5}{a^{2} x^{2}} - \frac {15}{a^{4} x^{4}} - 3\right )}}{a^{2}} + \frac {15 \, \arctan \left (\frac {1}{a x}\right )}{a^{7}}\right )} a \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^5*arccot(a*x),x, algorithm="giac")

[Out]

1/90*(15*x^6*arctan(1/(a*x))/a - x^5*(5/(a^2*x^2) - 15/(a^4*x^4) - 3)/a^2 + 15*arctan(1/(a*x))/a^7)*a

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maple [A]  time = 0.04, size = 42, normalized size = 0.82 \[ \frac {x}{6 a^{5}}-\frac {x^{3}}{18 a^{3}}+\frac {x^{5}}{30 a}+\frac {x^{6} \mathrm {arccot}\left (a x \right )}{6}-\frac {\arctan \left (a x \right )}{6 a^{6}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x^5*arccot(a*x),x)

[Out]

1/6*x/a^5-1/18*x^3/a^3+1/30*x^5/a+1/6*x^6*arccot(a*x)-1/6*arctan(a*x)/a^6

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maxima [A]  time = 0.41, size = 47, normalized size = 0.92 \[ \frac {1}{6} \, x^{6} \operatorname {arccot}\left (a x\right ) + \frac {1}{90} \, a {\left (\frac {3 \, a^{4} x^{5} - 5 \, a^{2} x^{3} + 15 \, x}{a^{6}} - \frac {15 \, \arctan \left (a x\right )}{a^{7}}\right )} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^5*arccot(a*x),x, algorithm="maxima")

[Out]

1/6*x^6*arccot(a*x) + 1/90*a*((3*a^4*x^5 - 5*a^2*x^3 + 15*x)/a^6 - 15*arctan(a*x)/a^7)

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mupad [B]  time = 0.80, size = 55, normalized size = 1.08 \[ \left \{\begin {array}{cl} \frac {\pi \,x^6}{12} & \text {\ if\ \ }a=0\\ \frac {x^6\,\mathrm {acot}\left (a\,x\right )}{6}-\frac {\frac {\mathrm {atan}\left (a\,x\right )}{6}-\frac {a\,x}{6}+\frac {a^3\,x^3}{18}-\frac {a^5\,x^5}{30}}{a^6} & \text {\ if\ \ }a\neq 0 \end {array}\right . \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x^5*acot(a*x),x)

[Out]

piecewise(a == 0, (x^6*pi)/12, a ~= 0, - (atan(a*x)/6 - (a*x)/6 + (a^3*x^3)/18 - (a^5*x^5)/30)/a^6 + (x^6*acot
(a*x))/6)

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sympy [A]  time = 1.22, size = 48, normalized size = 0.94 \[ \begin {cases} \frac {x^{6} \operatorname {acot}{\left (a x \right )}}{6} + \frac {x^{5}}{30 a} - \frac {x^{3}}{18 a^{3}} + \frac {x}{6 a^{5}} + \frac {\operatorname {acot}{\left (a x \right )}}{6 a^{6}} & \text {for}\: a \neq 0 \\\frac {\pi x^{6}}{12} & \text {otherwise} \end {cases} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x**5*acot(a*x),x)

[Out]

Piecewise((x**6*acot(a*x)/6 + x**5/(30*a) - x**3/(18*a**3) + x/(6*a**5) + acot(a*x)/(6*a**6), Ne(a, 0)), (pi*x
**6/12, True))

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