3.86 \(\int x^2 \cos (a+b \log (c x^n)) \, dx\)

Optimal. Leaf size=56 \[ \frac {b n x^3 \sin \left (a+b \log \left (c x^n\right )\right )}{b^2 n^2+9}+\frac {3 x^3 \cos \left (a+b \log \left (c x^n\right )\right )}{b^2 n^2+9} \]

[Out]

3*x^3*cos(a+b*ln(c*x^n))/(b^2*n^2+9)+b*n*x^3*sin(a+b*ln(c*x^n))/(b^2*n^2+9)

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Rubi [A]  time = 0.02, antiderivative size = 56, normalized size of antiderivative = 1.00, number of steps used = 1, number of rules used = 1, integrand size = 15, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.067, Rules used = {4486} \[ \frac {b n x^3 \sin \left (a+b \log \left (c x^n\right )\right )}{b^2 n^2+9}+\frac {3 x^3 \cos \left (a+b \log \left (c x^n\right )\right )}{b^2 n^2+9} \]

Antiderivative was successfully verified.

[In]

Int[x^2*Cos[a + b*Log[c*x^n]],x]

[Out]

(3*x^3*Cos[a + b*Log[c*x^n]])/(9 + b^2*n^2) + (b*n*x^3*Sin[a + b*Log[c*x^n]])/(9 + b^2*n^2)

Rule 4486

Int[Cos[((a_.) + Log[(c_.)*(x_)^(n_.)]*(b_.))*(d_.)]*((e_.)*(x_))^(m_.), x_Symbol] :> Simp[((m + 1)*(e*x)^(m +
1)*Cos[d*(a + b*Log[c*x^n])])/(b^2*d^2*e*n^2 + e*(m + 1)^2), x] + Simp[(b*d*n*(e*x)^(m + 1)*Sin[d*(a + b*Log[
c*x^n])])/(b^2*d^2*e*n^2 + e*(m + 1)^2), x] /; FreeQ[{a, b, c, d, e, m, n}, x] && NeQ[b^2*d^2*n^2 + (m + 1)^2,
0]

Rubi steps

\begin {align*} \int x^2 \cos \left (a+b \log \left (c x^n\right )\right ) \, dx &=\frac {3 x^3 \cos \left (a+b \log \left (c x^n\right )\right )}{9+b^2 n^2}+\frac {b n x^3 \sin \left (a+b \log \left (c x^n\right )\right )}{9+b^2 n^2}\\ \end {align*}

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Mathematica [A]  time = 0.09, size = 43, normalized size = 0.77 \[ \frac {x^3 \left (b n \sin \left (a+b \log \left (c x^n\right )\right )+3 \cos \left (a+b \log \left (c x^n\right )\right )\right )}{b^2 n^2+9} \]

Antiderivative was successfully verified.

[In]

Integrate[x^2*Cos[a + b*Log[c*x^n]],x]

[Out]

(x^3*(3*Cos[a + b*Log[c*x^n]] + b*n*Sin[a + b*Log[c*x^n]]))/(9 + b^2*n^2)

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fricas [A]  time = 0.64, size = 48, normalized size = 0.86 \[ \frac {b n x^{3} \sin \left (b n \log \relax (x) + b \log \relax (c) + a\right ) + 3 \, x^{3} \cos \left (b n \log \relax (x) + b \log \relax (c) + a\right )}{b^{2} n^{2} + 9} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^2*cos(a+b*log(c*x^n)),x, algorithm="fricas")

[Out]

(b*n*x^3*sin(b*n*log(x) + b*log(c) + a) + 3*x^3*cos(b*n*log(x) + b*log(c) + a))/(b^2*n^2 + 9)

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giac [B]  time = 0.43, size = 923, normalized size = 16.48 \[ \text {result too large to display} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^2*cos(a+b*log(c*x^n)),x, algorithm="giac")

[Out]

-1/2*(2*b*n*x^3*e^(1/2*pi*b*n*sgn(x) - 1/2*pi*b*n + 1/2*pi*b*sgn(c) - 1/2*pi*b)*tan(1/2*b*n*log(abs(x)) + 1/2*
b*log(abs(c)))^2*tan(1/2*a) + 2*b*n*x^3*e^(-1/2*pi*b*n*sgn(x) + 1/2*pi*b*n - 1/2*pi*b*sgn(c) + 1/2*pi*b)*tan(1
/2*b*n*log(abs(x)) + 1/2*b*log(abs(c)))^2*tan(1/2*a) + 2*b*n*x^3*e^(1/2*pi*b*n*sgn(x) - 1/2*pi*b*n + 1/2*pi*b*
sgn(c) - 1/2*pi*b)*tan(1/2*b*n*log(abs(x)) + 1/2*b*log(abs(c)))*tan(1/2*a)^2 + 2*b*n*x^3*e^(-1/2*pi*b*n*sgn(x)
+ 1/2*pi*b*n - 1/2*pi*b*sgn(c) + 1/2*pi*b)*tan(1/2*b*n*log(abs(x)) + 1/2*b*log(abs(c)))*tan(1/2*a)^2 - 3*x^3*
e^(1/2*pi*b*n*sgn(x) - 1/2*pi*b*n + 1/2*pi*b*sgn(c) - 1/2*pi*b)*tan(1/2*b*n*log(abs(x)) + 1/2*b*log(abs(c)))^2
*tan(1/2*a)^2 - 3*x^3*e^(-1/2*pi*b*n*sgn(x) + 1/2*pi*b*n - 1/2*pi*b*sgn(c) + 1/2*pi*b)*tan(1/2*b*n*log(abs(x))
+ 1/2*b*log(abs(c)))^2*tan(1/2*a)^2 - 2*b*n*x^3*e^(1/2*pi*b*n*sgn(x) - 1/2*pi*b*n + 1/2*pi*b*sgn(c) - 1/2*pi*
b)*tan(1/2*b*n*log(abs(x)) + 1/2*b*log(abs(c))) - 2*b*n*x^3*e^(-1/2*pi*b*n*sgn(x) + 1/2*pi*b*n - 1/2*pi*b*sgn(
c) + 1/2*pi*b)*tan(1/2*b*n*log(abs(x)) + 1/2*b*log(abs(c))) - 2*b*n*x^3*e^(1/2*pi*b*n*sgn(x) - 1/2*pi*b*n + 1/
2*pi*b*sgn(c) - 1/2*pi*b)*tan(1/2*a) - 2*b*n*x^3*e^(-1/2*pi*b*n*sgn(x) + 1/2*pi*b*n - 1/2*pi*b*sgn(c) + 1/2*pi
*b)*tan(1/2*a) + 3*x^3*e^(1/2*pi*b*n*sgn(x) - 1/2*pi*b*n + 1/2*pi*b*sgn(c) - 1/2*pi*b)*tan(1/2*b*n*log(abs(x))
+ 1/2*b*log(abs(c)))^2 + 3*x^3*e^(-1/2*pi*b*n*sgn(x) + 1/2*pi*b*n - 1/2*pi*b*sgn(c) + 1/2*pi*b)*tan(1/2*b*n*l
og(abs(x)) + 1/2*b*log(abs(c)))^2 + 12*x^3*e^(1/2*pi*b*n*sgn(x) - 1/2*pi*b*n + 1/2*pi*b*sgn(c) - 1/2*pi*b)*tan
(1/2*b*n*log(abs(x)) + 1/2*b*log(abs(c)))*tan(1/2*a) + 12*x^3*e^(-1/2*pi*b*n*sgn(x) + 1/2*pi*b*n - 1/2*pi*b*sg
n(c) + 1/2*pi*b)*tan(1/2*b*n*log(abs(x)) + 1/2*b*log(abs(c)))*tan(1/2*a) + 3*x^3*e^(1/2*pi*b*n*sgn(x) - 1/2*pi
*b*n + 1/2*pi*b*sgn(c) - 1/2*pi*b)*tan(1/2*a)^2 + 3*x^3*e^(-1/2*pi*b*n*sgn(x) + 1/2*pi*b*n - 1/2*pi*b*sgn(c) +
1/2*pi*b)*tan(1/2*a)^2 - 3*x^3*e^(1/2*pi*b*n*sgn(x) - 1/2*pi*b*n + 1/2*pi*b*sgn(c) - 1/2*pi*b) - 3*x^3*e^(-1/
2*pi*b*n*sgn(x) + 1/2*pi*b*n - 1/2*pi*b*sgn(c) + 1/2*pi*b))/(b^2*n^2*tan(1/2*b*n*log(abs(x)) + 1/2*b*log(abs(c
)))^2*tan(1/2*a)^2 + b^2*n^2*tan(1/2*b*n*log(abs(x)) + 1/2*b*log(abs(c)))^2 + b^2*n^2*tan(1/2*a)^2 + b^2*n^2 +
9*tan(1/2*b*n*log(abs(x)) + 1/2*b*log(abs(c)))^2*tan(1/2*a)^2 + 9*tan(1/2*b*n*log(abs(x)) + 1/2*b*log(abs(c))
)^2 + 9*tan(1/2*a)^2 + 9)

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maple [F]  time = 0.04, size = 0, normalized size = 0.00 \[ \int x^{2} \cos \left (a +b \ln \left (c \,x^{n}\right )\right )\, dx \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x^2*cos(a+b*ln(c*x^n)),x)

[Out]

int(x^2*cos(a+b*ln(c*x^n)),x)

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maxima [B]  time = 0.37, size = 218, normalized size = 3.89 \[ \frac {{\left ({\left (b \cos \left (b \log \relax (c)\right ) \sin \left (2 \, b \log \relax (c)\right ) - b \cos \left (2 \, b \log \relax (c)\right ) \sin \left (b \log \relax (c)\right ) + b \sin \left (b \log \relax (c)\right )\right )} n + 3 \, \cos \left (2 \, b \log \relax (c)\right ) \cos \left (b \log \relax (c)\right ) + 3 \, \sin \left (2 \, b \log \relax (c)\right ) \sin \left (b \log \relax (c)\right ) + 3 \, \cos \left (b \log \relax (c)\right )\right )} x^{3} \cos \left (b \log \left (x^{n}\right ) + a\right ) + {\left ({\left (b \cos \left (2 \, b \log \relax (c)\right ) \cos \left (b \log \relax (c)\right ) + b \sin \left (2 \, b \log \relax (c)\right ) \sin \left (b \log \relax (c)\right ) + b \cos \left (b \log \relax (c)\right )\right )} n - 3 \, \cos \left (b \log \relax (c)\right ) \sin \left (2 \, b \log \relax (c)\right ) + 3 \, \cos \left (2 \, b \log \relax (c)\right ) \sin \left (b \log \relax (c)\right ) - 3 \, \sin \left (b \log \relax (c)\right )\right )} x^{3} \sin \left (b \log \left (x^{n}\right ) + a\right )}{2 \, {\left ({\left (b^{2} \cos \left (b \log \relax (c)\right )^{2} + b^{2} \sin \left (b \log \relax (c)\right )^{2}\right )} n^{2} + 9 \, \cos \left (b \log \relax (c)\right )^{2} + 9 \, \sin \left (b \log \relax (c)\right )^{2}\right )}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^2*cos(a+b*log(c*x^n)),x, algorithm="maxima")

[Out]

1/2*(((b*cos(b*log(c))*sin(2*b*log(c)) - b*cos(2*b*log(c))*sin(b*log(c)) + b*sin(b*log(c)))*n + 3*cos(2*b*log(
c))*cos(b*log(c)) + 3*sin(2*b*log(c))*sin(b*log(c)) + 3*cos(b*log(c)))*x^3*cos(b*log(x^n) + a) + ((b*cos(2*b*l
og(c))*cos(b*log(c)) + b*sin(2*b*log(c))*sin(b*log(c)) + b*cos(b*log(c)))*n - 3*cos(b*log(c))*sin(2*b*log(c))
+ 3*cos(2*b*log(c))*sin(b*log(c)) - 3*sin(b*log(c)))*x^3*sin(b*log(x^n) + a))/((b^2*cos(b*log(c))^2 + b^2*sin(
b*log(c))^2)*n^2 + 9*cos(b*log(c))^2 + 9*sin(b*log(c))^2)

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mupad [B]  time = 2.45, size = 43, normalized size = 0.77 \[ \frac {x^3\,\left (3\,\cos \left (a+b\,\ln \left (c\,x^n\right )\right )+b\,n\,\sin \left (a+b\,\ln \left (c\,x^n\right )\right )\right )}{b^2\,n^2+9} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x^2*cos(a + b*log(c*x^n)),x)

[Out]

(x^3*(3*cos(a + b*log(c*x^n)) + b*n*sin(a + b*log(c*x^n))))/(b^2*n^2 + 9)

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sympy [F]  time = 0.00, size = 0, normalized size = 0.00 \[ \begin {cases} \int x^{2} \cos {\left (a - \frac {3 i \log {\left (c x^{n} \right )}}{n} \right )}\, dx & \text {for}\: b = - \frac {3 i}{n} \\\int x^{2} \cos {\left (a + \frac {3 i \log {\left (c x^{n} \right )}}{n} \right )}\, dx & \text {for}\: b = \frac {3 i}{n} \\\frac {b n x^{3} \sin {\left (a + b n \log {\relax (x )} + b \log {\relax (c )} \right )}}{b^{2} n^{2} + 9} + \frac {3 x^{3} \cos {\left (a + b n \log {\relax (x )} + b \log {\relax (c )} \right )}}{b^{2} n^{2} + 9} & \text {otherwise} \end {cases} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x**2*cos(a+b*ln(c*x**n)),x)

[Out]

Piecewise((Integral(x**2*cos(a - 3*I*log(c*x**n)/n), x), Eq(b, -3*I/n)), (Integral(x**2*cos(a + 3*I*log(c*x**n
)/n), x), Eq(b, 3*I/n)), (b*n*x**3*sin(a + b*n*log(x) + b*log(c))/(b**2*n**2 + 9) + 3*x**3*cos(a + b*n*log(x)
+ b*log(c))/(b**2*n**2 + 9), True))

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