3.109 \(\int \cos ^3(a+\frac {1}{3} \sqrt {-\frac {1}{n^2}} \log (c x^n)) \, dx\)

Optimal. Leaf size=128 \[ \frac {9}{16} x e^{a \sqrt {-\frac {1}{n^2}} n} \left (c x^n\right )^{\left .-\frac {1}{3}\right /n}+\frac {9}{32} x e^{-a \sqrt {-\frac {1}{n^2}} n} \left (c x^n\right )^{\left .\frac {1}{3}\right /n}+\frac {1}{16} x e^{-3 a \sqrt {-\frac {1}{n^2}} n} \left (c x^n\right )^{\frac {1}{n}}+\frac {1}{8} x e^{3 a \sqrt {-\frac {1}{n^2}} n} \log (x) \left (c x^n\right )^{-1/n} \]

[Out]

9/16*exp(a*n*(-1/n^2)^(1/2))*x/((c*x^n)^(1/3/n))+9/32*x*(c*x^n)^(1/3/n)/exp(a*n*(-1/n^2)^(1/2))+1/16*x*(c*x^n)
^(1/n)/exp(3*a*n*(-1/n^2)^(1/2))+1/8*exp(3*a*n*(-1/n^2)^(1/2))*x*ln(x)/((c*x^n)^(1/n))

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Rubi [A]  time = 0.10, antiderivative size = 128, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, integrand size = 24, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.083, Rules used = {4484, 4490} \[ \frac {9}{16} x e^{a \sqrt {-\frac {1}{n^2}} n} \left (c x^n\right )^{\left .-\frac {1}{3}\right /n}+\frac {9}{32} x e^{-a \sqrt {-\frac {1}{n^2}} n} \left (c x^n\right )^{\left .\frac {1}{3}\right /n}+\frac {1}{16} x e^{-3 a \sqrt {-\frac {1}{n^2}} n} \left (c x^n\right )^{\frac {1}{n}}+\frac {1}{8} x e^{3 a \sqrt {-\frac {1}{n^2}} n} \log (x) \left (c x^n\right )^{-1/n} \]

Antiderivative was successfully verified.

[In]

Int[Cos[a + (Sqrt[-n^(-2)]*Log[c*x^n])/3]^3,x]

[Out]

(9*E^(a*Sqrt[-n^(-2)]*n)*x)/(16*(c*x^n)^(1/(3*n))) + (9*x*(c*x^n)^(1/(3*n)))/(32*E^(a*Sqrt[-n^(-2)]*n)) + (x*(
c*x^n)^n^(-1))/(16*E^(3*a*Sqrt[-n^(-2)]*n)) + (E^(3*a*Sqrt[-n^(-2)]*n)*x*Log[x])/(8*(c*x^n)^n^(-1))

Rule 4484

Int[Cos[((a_.) + Log[(c_.)*(x_)^(n_.)]*(b_.))*(d_.)]^(p_.), x_Symbol] :> Dist[x/(n*(c*x^n)^(1/n)), Subst[Int[x
^(1/n - 1)*Cos[d*(a + b*Log[x])]^p, x], x, c*x^n], x] /; FreeQ[{a, b, c, d, n, p}, x] && (NeQ[c, 1] || NeQ[n,
1])

Rule 4490

Int[Cos[((a_.) + Log[x_]*(b_.))*(d_.)]^(p_.)*((e_.)*(x_))^(m_.), x_Symbol] :> Dist[1/2^p, Int[ExpandIntegrand[
(e*x)^m*(E^((a*b*d^2*p)/(m + 1))/x^((m + 1)/p) + x^((m + 1)/p)/E^((a*b*d^2*p)/(m + 1)))^p, x], x], x] /; FreeQ
[{a, b, d, e, m}, x] && IGtQ[p, 0] && EqQ[b^2*d^2*p^2 + (m + 1)^2, 0]

Rubi steps

\begin {align*} \int \cos ^3\left (a+\frac {1}{3} \sqrt {-\frac {1}{n^2}} \log \left (c x^n\right )\right ) \, dx &=\frac {\left (x \left (c x^n\right )^{-1/n}\right ) \operatorname {Subst}\left (\int x^{-1+\frac {1}{n}} \cos ^3\left (a+\frac {1}{3} \sqrt {-\frac {1}{n^2}} \log (x)\right ) \, dx,x,c x^n\right )}{n}\\ &=\frac {\left (x \left (c x^n\right )^{-1/n}\right ) \operatorname {Subst}\left (\int \left (\frac {e^{3 a \sqrt {-\frac {1}{n^2}} n}}{x}+3 e^{a \sqrt {-\frac {1}{n^2}} n} x^{-1+\frac {2}{3 n}}+3 e^{-a \sqrt {-\frac {1}{n^2}} n} x^{-1+\frac {4}{3 n}}+e^{-3 a \sqrt {-\frac {1}{n^2}} n} x^{-1+\frac {2}{n}}\right ) \, dx,x,c x^n\right )}{8 n}\\ &=\frac {9}{16} e^{a \sqrt {-\frac {1}{n^2}} n} x \left (c x^n\right )^{\left .-\frac {1}{3}\right /n}+\frac {9}{32} e^{-a \sqrt {-\frac {1}{n^2}} n} x \left (c x^n\right )^{\left .\frac {1}{3}\right /n}+\frac {1}{16} e^{-3 a \sqrt {-\frac {1}{n^2}} n} x \left (c x^n\right )^{\frac {1}{n}}+\frac {1}{8} e^{3 a \sqrt {-\frac {1}{n^2}} n} x \left (c x^n\right )^{-1/n} \log (x)\\ \end {align*}

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Mathematica [F]  time = 0.22, size = 0, normalized size = 0.00 \[ \int \cos ^3\left (a+\frac {1}{3} \sqrt {-\frac {1}{n^2}} \log \left (c x^n\right )\right ) \, dx \]

Verification is Not applicable to the result.

[In]

Integrate[Cos[a + (Sqrt[-n^(-2)]*Log[c*x^n])/3]^3,x]

[Out]

Integrate[Cos[a + (Sqrt[-n^(-2)]*Log[c*x^n])/3]^3, x]

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fricas [C]  time = 0.61, size = 84, normalized size = 0.66 \[ \frac {1}{32} \, {\left (9 \, x^{\frac {4}{3}} e^{\left (\frac {2 \, {\left (3 i \, a n - \log \relax (c)\right )}}{3 \, n}\right )} + 2 \, x^{2} + 12 \, e^{\left (\frac {2 \, {\left (3 i \, a n - \log \relax (c)\right )}}{n}\right )} \log \left (x^{\frac {1}{3}}\right ) + 18 \, x^{\frac {2}{3}} e^{\left (\frac {4 \, {\left (3 i \, a n - \log \relax (c)\right )}}{3 \, n}\right )}\right )} e^{\left (-\frac {3 i \, a n - \log \relax (c)}{n}\right )} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(a+1/3*log(c*x^n)*(-1/n^2)^(1/2))^3,x, algorithm="fricas")

[Out]

1/32*(9*x^(4/3)*e^(2/3*(3*I*a*n - log(c))/n) + 2*x^2 + 12*e^(2*(3*I*a*n - log(c))/n)*log(x^(1/3)) + 18*x^(2/3)
*e^(4/3*(3*I*a*n - log(c))/n))*e^(-(3*I*a*n - log(c))/n)

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giac [F(-2)]  time = 0.00, size = 0, normalized size = 0.00 \[ \text {Exception raised: NotImplementedError} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(a+1/3*log(c*x^n)*(-1/n^2)^(1/2))^3,x, algorithm="giac")

[Out]

Exception raised: NotImplementedError >> Unable to parse Giac output: (9*n^4*x*exp((-3*i)*a)*exp((n*abs(n)*ln(
x)+abs(n)*ln(c))/n^2)+27*n^4*x*exp((-i)*a)*exp((n*abs(n)*ln(x)+abs(n)*ln(c))*1/3/n^2)+27*n^4*x*exp(-(n*abs(n)*
ln(x)+abs(n)*ln(c))*1/3/n^2)*exp(i*a)+9*n^4*x*exp(-(n*abs(n)*ln(x)+abs(n)*ln(c))/n^2)*exp(3*i*a)-9*n^3*x*abs(n
)*exp((-3*i)*a)*exp((n*abs(n)*ln(x)+abs(n)*ln(c))/n^2)-9*n^3*x*abs(n)*exp((-i)*a)*exp((n*abs(n)*ln(x)+abs(n)*l
n(c))*1/3/n^2)+9*n^3*x*abs(n)*exp(-(n*abs(n)*ln(x)+abs(n)*ln(c))*1/3/n^2)*exp(i*a)+9*n^3*x*abs(n)*exp(-(n*abs(
n)*ln(x)+abs(n)*ln(c))/n^2)*exp(3*i*a)-n^2*x*n^2*exp((-3*i)*a)*exp((n*abs(n)*ln(x)+abs(n)*ln(c))/n^2)-27*n^2*x
*n^2*exp((-i)*a)*exp((n*abs(n)*ln(x)+abs(n)*ln(c))*1/3/n^2)-27*n^2*x*n^2*exp(-(n*abs(n)*ln(x)+abs(n)*ln(c))*1/
3/n^2)*exp(i*a)-n^2*x*n^2*exp(-(n*abs(n)*ln(x)+abs(n)*ln(c))/n^2)*exp(3*i*a)+n*x*abs(n)*n^2*exp((-3*i)*a)*exp(
(n*abs(n)*ln(x)+abs(n)*ln(c))/n^2)+9*n*x*abs(n)*n^2*exp((-i)*a)*exp((n*abs(n)*ln(x)+abs(n)*ln(c))*1/3/n^2)-9*n
*x*abs(n)*n^2*exp(-(n*abs(n)*ln(x)+abs(n)*ln(c))*1/3/n^2)*exp(i*a)-n*x*abs(n)*n^2*exp(-(n*abs(n)*ln(x)+abs(n)*
ln(c))/n^2)*exp(3*i*a))/(72*n^4-80*n^2*n^2+8*n^4)

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maple [F]  time = 0.10, size = 0, normalized size = 0.00 \[ \int \cos ^{3}\left (a +\frac {\ln \left (c \,x^{n}\right ) \sqrt {-\frac {1}{n^{2}}}}{3}\right )\, dx \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(cos(a+1/3*ln(c*x^n)*(-1/n^2)^(1/2))^3,x)

[Out]

int(cos(a+1/3*ln(c*x^n)*(-1/n^2)^(1/2))^3,x)

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maxima [A]  time = 0.40, size = 106, normalized size = 0.83 \[ \frac {9 \, c^{\frac {5}{3 \, n}} x {\left (x^{n}\right )}^{\frac {2}{3 \, n}} \cos \relax (a) + 4 \, c^{\frac {1}{3 \, n}} {\left (x^{n}\right )}^{\frac {1}{3 \, n}} \cos \left (3 \, a\right ) \log \relax (x) + 18 \, c^{\left (\frac {1}{n}\right )} x \cos \relax (a) + 2 \, c^{\frac {7}{3 \, n}} \cos \left (3 \, a\right ) e^{\left (\frac {\log \left (x^{n}\right )}{3 \, n} + 2 \, \log \relax (x)\right )}}{32 \, c^{\frac {4}{3 \, n}} {\left (x^{n}\right )}^{\frac {1}{3 \, n}}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(a+1/3*log(c*x^n)*(-1/n^2)^(1/2))^3,x, algorithm="maxima")

[Out]

1/32*(9*c^(5/3/n)*x*(x^n)^(2/3/n)*cos(a) + 4*c^(1/3/n)*(x^n)^(1/3/n)*cos(3*a)*log(x) + 18*c^(1/n)*x*cos(a) + 2
*c^(7/3/n)*cos(3*a)*e^(1/3*log(x^n)/n + 2*log(x)))/(c^(4/3/n)*(x^n)^(1/3/n))

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mupad [B]  time = 3.01, size = 158, normalized size = 1.23 \[ x\,{\mathrm {e}}^{-a\,1{}\mathrm {i}}\,\frac {1}{{\left (c\,x^n\right )}^{\frac {\sqrt {-\frac {1}{n^2}}\,1{}\mathrm {i}}{3}}}\,\left (\frac {27}{64}+\frac {n\,\sqrt {-\frac {1}{n^2}}\,9{}\mathrm {i}}{64}\right )-x\,{\mathrm {e}}^{a\,1{}\mathrm {i}}\,{\left (c\,x^n\right )}^{\frac {\sqrt {-\frac {1}{n^2}}\,1{}\mathrm {i}}{3}}\,\left (-\frac {27}{64}+\frac {n\,\sqrt {-\frac {1}{n^2}}\,9{}\mathrm {i}}{64}\right )+\frac {x\,{\mathrm {e}}^{-a\,3{}\mathrm {i}}\,\frac {1}{{\left (c\,x^n\right )}^{\sqrt {-\frac {1}{n^2}}\,1{}\mathrm {i}}}\,1{}\mathrm {i}}{8\,n\,\sqrt {-\frac {1}{n^2}}+8{}\mathrm {i}}-\frac {x\,{\mathrm {e}}^{a\,3{}\mathrm {i}}\,{\left (c\,x^n\right )}^{\sqrt {-\frac {1}{n^2}}\,1{}\mathrm {i}}\,1{}\mathrm {i}}{8\,n\,\sqrt {-\frac {1}{n^2}}-8{}\mathrm {i}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(cos(a + (log(c*x^n)*(-1/n^2)^(1/2))/3)^3,x)

[Out]

x*exp(-a*1i)/(c*x^n)^(((-1/n^2)^(1/2)*1i)/3)*((n*(-1/n^2)^(1/2)*9i)/64 + 27/64) - x*exp(a*1i)*(c*x^n)^(((-1/n^
2)^(1/2)*1i)/3)*((n*(-1/n^2)^(1/2)*9i)/64 - 27/64) + (x*exp(-a*3i)/(c*x^n)^((-1/n^2)^(1/2)*1i)*1i)/(8*n*(-1/n^
2)^(1/2) + 8i) - (x*exp(a*3i)*(c*x^n)^((-1/n^2)^(1/2)*1i)*1i)/(8*n*(-1/n^2)^(1/2) - 8i)

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sympy [F]  time = 0.00, size = 0, normalized size = 0.00 \[ \int \cos ^{3}{\left (a + \frac {\sqrt {- \frac {1}{n^{2}}} \log {\left (c x^{n} \right )}}{3} \right )}\, dx \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(a+1/3*ln(c*x**n)*(-1/n**2)**(1/2))**3,x)

[Out]

Integral(cos(a + sqrt(-1/n**2)*log(c*x**n)/3)**3, x)

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