3.90 \(\int \frac{\cos (a+b \log (c x^n))}{x^2} \, dx\)

Optimal. Leaf size=56 \[ \frac{b n \sin \left (a+b \log \left (c x^n\right )\right )}{x \left (b^2 n^2+1\right )}-\frac{\cos \left (a+b \log \left (c x^n\right )\right )}{x \left (b^2 n^2+1\right )} \]

[Out]

-(Cos[a + b*Log[c*x^n]]/((1 + b^2*n^2)*x)) + (b*n*Sin[a + b*Log[c*x^n]])/((1 + b^2*n^2)*x)

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Rubi [A]  time = 0.015031, antiderivative size = 56, normalized size of antiderivative = 1., 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} \[ \frac{b n \sin \left (a+b \log \left (c x^n\right )\right )}{x \left (b^2 n^2+1\right )}-\frac{\cos \left (a+b \log \left (c x^n\right )\right )}{x \left (b^2 n^2+1\right )} \]

Antiderivative was successfully verified.

[In]

Int[Cos[a + b*Log[c*x^n]]/x^2,x]

[Out]

-(Cos[a + b*Log[c*x^n]]/((1 + b^2*n^2)*x)) + (b*n*Sin[a + b*Log[c*x^n]])/((1 + b^2*n^2)*x)

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 \frac{\cos \left (a+b \log \left (c x^n\right )\right )}{x^2} \, dx &=-\frac{\cos \left (a+b \log \left (c x^n\right )\right )}{\left (1+b^2 n^2\right ) x}+\frac{b n \sin \left (a+b \log \left (c x^n\right )\right )}{\left (1+b^2 n^2\right ) x}\\ \end{align*}

Mathematica [A]  time = 0.0565324, size = 41, normalized size = 0.73 \[ \frac{b n \sin \left (a+b \log \left (c x^n\right )\right )-\cos \left (a+b \log \left (c x^n\right )\right )}{b^2 n^2 x+x} \]

Antiderivative was successfully verified.

[In]

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

[Out]

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

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Maple [F]  time = 0.036, size = 0, normalized size = 0. \begin{align*} \int{\frac{\cos \left ( a+b\ln \left ( c{x}^{n} \right ) \right ) }{{x}^{2}}}\, dx \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

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Maxima [B]  time = 1.09827, size = 281, normalized size = 5.02 \begin{align*} \frac{{\left ({\left (b \cos \left (b \log \left (c\right )\right ) \sin \left (2 \, b \log \left (c\right )\right ) - b \cos \left (2 \, b \log \left (c\right )\right ) \sin \left (b \log \left (c\right )\right ) + b \sin \left (b \log \left (c\right )\right )\right )} n - \cos \left (2 \, b \log \left (c\right )\right ) \cos \left (b \log \left (c\right )\right ) - \sin \left (2 \, b \log \left (c\right )\right ) \sin \left (b \log \left (c\right )\right ) - \cos \left (b \log \left (c\right )\right )\right )} \cos \left (b \log \left (x^{n}\right ) + a\right ) +{\left ({\left (b \cos \left (2 \, b \log \left (c\right )\right ) \cos \left (b \log \left (c\right )\right ) + b \sin \left (2 \, b \log \left (c\right )\right ) \sin \left (b \log \left (c\right )\right ) + b \cos \left (b \log \left (c\right )\right )\right )} n + \cos \left (b \log \left (c\right )\right ) \sin \left (2 \, b \log \left (c\right )\right ) - \cos \left (2 \, b \log \left (c\right )\right ) \sin \left (b \log \left (c\right )\right ) + \sin \left (b \log \left (c\right )\right )\right )} \sin \left (b \log \left (x^{n}\right ) + a\right )}{2 \,{\left ({\left (b^{2} \cos \left (b \log \left (c\right )\right )^{2} + b^{2} \sin \left (b \log \left (c\right )\right )^{2}\right )} n^{2} + \cos \left (b \log \left (c\right )\right )^{2} + \sin \left (b \log \left (c\right )\right )^{2}\right )} x} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(a+b*log(c*x^n))/x^2,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 - cos(2*b*log(c)
)*cos(b*log(c)) - sin(2*b*log(c))*sin(b*log(c)) - cos(b*log(c)))*cos(b*log(x^n) + a) + ((b*cos(2*b*log(c))*cos
(b*log(c)) + b*sin(2*b*log(c))*sin(b*log(c)) + b*cos(b*log(c)))*n + cos(b*log(c))*sin(2*b*log(c)) - cos(2*b*lo
g(c))*sin(b*log(c)) + sin(b*log(c)))*sin(b*log(x^n) + a))/(((b^2*cos(b*log(c))^2 + b^2*sin(b*log(c))^2)*n^2 +
cos(b*log(c))^2 + sin(b*log(c))^2)*x)

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Fricas [A]  time = 0.487415, size = 120, normalized size = 2.14 \begin{align*} \frac{b n \sin \left (b n \log \left (x\right ) + b \log \left (c\right ) + a\right ) - \cos \left (b n \log \left (x\right ) + b \log \left (c\right ) + a\right )}{{\left (b^{2} n^{2} + 1\right )} x} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

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Sympy [A]  time = 25.1753, size = 287, normalized size = 5.12 \begin{align*} \begin{cases} - \frac{i \log{\left (x \right )} \sin{\left (- a + i \log{\left (x \right )} + \frac{i \log{\left (c \right )}}{n} \right )}}{2 x} + \frac{\log{\left (x \right )} \cos{\left (- a + i \log{\left (x \right )} + \frac{i \log{\left (c \right )}}{n} \right )}}{2 x} - \frac{i \sin{\left (- a + i \log{\left (x \right )} + \frac{i \log{\left (c \right )}}{n} \right )}}{2 x} - \frac{i \log{\left (c \right )} \sin{\left (- a + i \log{\left (x \right )} + \frac{i \log{\left (c \right )}}{n} \right )}}{2 n x} + \frac{\log{\left (c \right )} \cos{\left (- a + i \log{\left (x \right )} + \frac{i \log{\left (c \right )}}{n} \right )}}{2 n x} & \text{for}\: b = - \frac{i}{n} \\- \frac{i \log{\left (x \right )} \sin{\left (a + i \log{\left (x \right )} + \frac{i \log{\left (c \right )}}{n} \right )}}{2 x} + \frac{\log{\left (x \right )} \cos{\left (a + i \log{\left (x \right )} + \frac{i \log{\left (c \right )}}{n} \right )}}{2 x} - \frac{i \sin{\left (a + i \log{\left (x \right )} + \frac{i \log{\left (c \right )}}{n} \right )}}{2 x} - \frac{i \log{\left (c \right )} \sin{\left (a + i \log{\left (x \right )} + \frac{i \log{\left (c \right )}}{n} \right )}}{2 n x} + \frac{\log{\left (c \right )} \cos{\left (a + i \log{\left (x \right )} + \frac{i \log{\left (c \right )}}{n} \right )}}{2 n x} & \text{for}\: b = \frac{i}{n} \\\frac{b n \sin{\left (a + b n \log{\left (x \right )} + b \log{\left (c \right )} \right )}}{b^{2} n^{2} x + x} - \frac{\cos{\left (a + b n \log{\left (x \right )} + b \log{\left (c \right )} \right )}}{b^{2} n^{2} x + x} & \text{otherwise} \end{cases} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

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Giac [F]  time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{\cos \left (b \log \left (c x^{n}\right ) + a\right )}{x^{2}}\,{d x} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

integrate(cos(b*log(c*x^n) + a)/x^2, x)