Integrand size = 7, antiderivative size = 51 \[ \int \log \left (a \csc ^n(x)\right ) \, dx=-\frac {1}{2} i n x^2+n x \log \left (1-e^{2 i x}\right )+x \log \left (a \csc ^n(x)\right )-\frac {1}{2} i n \operatorname {PolyLog}\left (2,e^{2 i x}\right ) \] Output:
-1/2*I*n*x^2+n*x*ln(1-exp(2*I*x))+x*ln(a*csc(x)^n)-1/2*I*n*polylog(2,exp(2 *I*x))
Time = 0.03 (sec) , antiderivative size = 51, normalized size of antiderivative = 1.00 \[ \int \log \left (a \csc ^n(x)\right ) \, dx=-\frac {1}{2} i n x^2+n x \log \left (1-e^{2 i x}\right )+x \log \left (a \csc ^n(x)\right )-\frac {1}{2} i n \operatorname {PolyLog}\left (2,e^{2 i x}\right ) \] Input:
Integrate[Log[a*Csc[x]^n],x]
Output:
(-1/2*I)*n*x^2 + n*x*Log[1 - E^((2*I)*x)] + x*Log[a*Csc[x]^n] - (I/2)*n*Po lyLog[2, E^((2*I)*x)]
Time = 0.36 (sec) , antiderivative size = 60, normalized size of antiderivative = 1.18, number of steps used = 11, number of rules used = 10, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 1.429, Rules used = {3028, 25, 27, 3042, 25, 4200, 25, 2620, 2715, 2838}
Below are the steps used by Rubi to obtain the solution. The rule number used for the transformation is given above next to the arrow. The rules definitions used are listed below.
\(\displaystyle \int \log \left (a \csc ^n(x)\right ) \, dx\) |
\(\Big \downarrow \) 3028 |
\(\displaystyle x \log \left (a \csc ^n(x)\right )-\int -n x \cot (x)dx\) |
\(\Big \downarrow \) 25 |
\(\displaystyle \int n x \cot (x)dx+x \log \left (a \csc ^n(x)\right )\) |
\(\Big \downarrow \) 27 |
\(\displaystyle n \int x \cot (x)dx+x \log \left (a \csc ^n(x)\right )\) |
\(\Big \downarrow \) 3042 |
\(\displaystyle n \int -x \tan \left (x+\frac {\pi }{2}\right )dx+x \log \left (a \csc ^n(x)\right )\) |
\(\Big \downarrow \) 25 |
\(\displaystyle x \log \left (a \csc ^n(x)\right )-n \int x \tan \left (x+\frac {\pi }{2}\right )dx\) |
\(\Big \downarrow \) 4200 |
\(\displaystyle x \log \left (a \csc ^n(x)\right )-n \left (\frac {i x^2}{2}-2 i \int -\frac {e^{2 i x} x}{1-e^{2 i x}}dx\right )\) |
\(\Big \downarrow \) 25 |
\(\displaystyle x \log \left (a \csc ^n(x)\right )-n \left (2 i \int \frac {e^{2 i x} x}{1-e^{2 i x}}dx+\frac {i x^2}{2}\right )\) |
\(\Big \downarrow \) 2620 |
\(\displaystyle x \log \left (a \csc ^n(x)\right )-n \left (2 i \left (\frac {1}{2} i x \log \left (1-e^{2 i x}\right )-\frac {1}{2} i \int \log \left (1-e^{2 i x}\right )dx\right )+\frac {i x^2}{2}\right )\) |
\(\Big \downarrow \) 2715 |
\(\displaystyle x \log \left (a \csc ^n(x)\right )-n \left (2 i \left (\frac {1}{2} i x \log \left (1-e^{2 i x}\right )-\frac {1}{4} \int e^{-2 i x} \log \left (1-e^{2 i x}\right )de^{2 i x}\right )+\frac {i x^2}{2}\right )\) |
\(\Big \downarrow \) 2838 |
\(\displaystyle x \log \left (a \csc ^n(x)\right )-n \left (2 i \left (\frac {1}{4} \operatorname {PolyLog}\left (2,e^{2 i x}\right )+\frac {1}{2} i x \log \left (1-e^{2 i x}\right )\right )+\frac {i x^2}{2}\right )\) |
Input:
Int[Log[a*Csc[x]^n],x]
Output:
x*Log[a*Csc[x]^n] - n*((I/2)*x^2 + (2*I)*((I/2)*x*Log[1 - E^((2*I)*x)] + P olyLog[2, E^((2*I)*x)]/4))
Int[(a_)*(Fx_), x_Symbol] :> Simp[a Int[Fx, x], x] /; FreeQ[a, x] && !Ma tchQ[Fx, (b_)*(Gx_) /; FreeQ[b, x]]
Int[(((F_)^((g_.)*((e_.) + (f_.)*(x_))))^(n_.)*((c_.) + (d_.)*(x_))^(m_.))/ ((a_) + (b_.)*((F_)^((g_.)*((e_.) + (f_.)*(x_))))^(n_.)), x_Symbol] :> Simp [((c + d*x)^m/(b*f*g*n*Log[F]))*Log[1 + b*((F^(g*(e + f*x)))^n/a)], x] - Si mp[d*(m/(b*f*g*n*Log[F])) Int[(c + d*x)^(m - 1)*Log[1 + b*((F^(g*(e + f*x )))^n/a)], x], x] /; FreeQ[{F, a, b, c, d, e, f, g, n}, x] && IGtQ[m, 0]
Int[Log[(a_) + (b_.)*((F_)^((e_.)*((c_.) + (d_.)*(x_))))^(n_.)], x_Symbol] :> Simp[1/(d*e*n*Log[F]) Subst[Int[Log[a + b*x]/x, x], x, (F^(e*(c + d*x) ))^n], x] /; FreeQ[{F, a, b, c, d, e, n}, x] && GtQ[a, 0]
Int[Log[(c_.)*((d_) + (e_.)*(x_)^(n_.))]/(x_), x_Symbol] :> Simp[-PolyLog[2 , (-c)*e*x^n]/n, x] /; FreeQ[{c, d, e, n}, x] && EqQ[c*d, 1]
Int[Log[u_], x_Symbol] :> Simp[x*Log[u], x] - Int[SimplifyIntegrand[x*(D[u, x]/u), x], x] /; InverseFunctionFreeQ[u, x]
Int[((c_.) + (d_.)*(x_))^(m_.)*tan[(e_.) + Pi*(k_.) + (f_.)*(x_)], x_Symbol ] :> Simp[I*((c + d*x)^(m + 1)/(d*(m + 1))), x] - Simp[2*I Int[(c + d*x)^ m*E^(2*I*k*Pi)*(E^(2*I*(e + f*x))/(1 + E^(2*I*k*Pi)*E^(2*I*(e + f*x)))), x] , x] /; FreeQ[{c, d, e, f}, x] && IntegerQ[4*k] && IGtQ[m, 0]
\[\int \ln \left (a \csc \left (x \right )^{n}\right )d x\]
Input:
int(ln(a*csc(x)^n),x)
Output:
int(ln(a*csc(x)^n),x)
Both result and optimal contain complex but leaf count of result is larger than twice the leaf count of optimal. 117 vs. \(2 (36) = 72\).
Time = 0.09 (sec) , antiderivative size = 117, normalized size of antiderivative = 2.29 \[ \int \log \left (a \csc ^n(x)\right ) \, dx=n x \log \left (\frac {1}{\sin \left (x\right )}\right ) + \frac {1}{2} \, n x \log \left (\cos \left (x\right ) + i \, \sin \left (x\right ) + 1\right ) + \frac {1}{2} \, n x \log \left (\cos \left (x\right ) - i \, \sin \left (x\right ) + 1\right ) + \frac {1}{2} \, n x \log \left (-\cos \left (x\right ) + i \, \sin \left (x\right ) + 1\right ) + \frac {1}{2} \, n x \log \left (-\cos \left (x\right ) - i \, \sin \left (x\right ) + 1\right ) - \frac {1}{2} i \, n {\rm Li}_2\left (\cos \left (x\right ) + i \, \sin \left (x\right )\right ) + \frac {1}{2} i \, n {\rm Li}_2\left (\cos \left (x\right ) - i \, \sin \left (x\right )\right ) + \frac {1}{2} i \, n {\rm Li}_2\left (-\cos \left (x\right ) + i \, \sin \left (x\right )\right ) - \frac {1}{2} i \, n {\rm Li}_2\left (-\cos \left (x\right ) - i \, \sin \left (x\right )\right ) + x \log \left (a\right ) \] Input:
integrate(log(a*csc(x)^n),x, algorithm="fricas")
Output:
n*x*log(1/sin(x)) + 1/2*n*x*log(cos(x) + I*sin(x) + 1) + 1/2*n*x*log(cos(x ) - I*sin(x) + 1) + 1/2*n*x*log(-cos(x) + I*sin(x) + 1) + 1/2*n*x*log(-cos (x) - I*sin(x) + 1) - 1/2*I*n*dilog(cos(x) + I*sin(x)) + 1/2*I*n*dilog(cos (x) - I*sin(x)) + 1/2*I*n*dilog(-cos(x) + I*sin(x)) - 1/2*I*n*dilog(-cos(x ) - I*sin(x)) + x*log(a)
\[ \int \log \left (a \csc ^n(x)\right ) \, dx=\int \log {\left (a \csc ^{n}{\left (x \right )} \right )}\, dx \] Input:
integrate(ln(a*csc(x)**n),x)
Output:
Integral(log(a*csc(x)**n), x)
Both result and optimal contain complex but leaf count of result is larger than twice the leaf count of optimal. 91 vs. \(2 (36) = 72\).
Time = 0.25 (sec) , antiderivative size = 91, normalized size of antiderivative = 1.78 \[ \int \log \left (a \csc ^n(x)\right ) \, dx=\frac {1}{2} \, {\left (-i \, x^{2} + 2 i \, x \arctan \left (\sin \left (x\right ), \cos \left (x\right ) + 1\right ) - 2 i \, x \arctan \left (\sin \left (x\right ), -\cos \left (x\right ) + 1\right ) + x \log \left (\cos \left (x\right )^{2} + \sin \left (x\right )^{2} + 2 \, \cos \left (x\right ) + 1\right ) + x \log \left (\cos \left (x\right )^{2} + \sin \left (x\right )^{2} - 2 \, \cos \left (x\right ) + 1\right ) - 2 i \, {\rm Li}_2\left (-e^{\left (i \, x\right )}\right ) - 2 i \, {\rm Li}_2\left (e^{\left (i \, x\right )}\right )\right )} n + x \log \left (a \csc \left (x\right )^{n}\right ) \] Input:
integrate(log(a*csc(x)^n),x, algorithm="maxima")
Output:
1/2*(-I*x^2 + 2*I*x*arctan2(sin(x), cos(x) + 1) - 2*I*x*arctan2(sin(x), -c os(x) + 1) + x*log(cos(x)^2 + sin(x)^2 + 2*cos(x) + 1) + x*log(cos(x)^2 + sin(x)^2 - 2*cos(x) + 1) - 2*I*dilog(-e^(I*x)) - 2*I*dilog(e^(I*x)))*n + x *log(a*csc(x)^n)
\[ \int \log \left (a \csc ^n(x)\right ) \, dx=\int { \log \left (a \csc \left (x\right )^{n}\right ) \,d x } \] Input:
integrate(log(a*csc(x)^n),x, algorithm="giac")
Output:
integrate(log(a*csc(x)^n), x)
Timed out. \[ \int \log \left (a \csc ^n(x)\right ) \, dx=\int \ln \left (a\,{\left (\frac {1}{\sin \left (x\right )}\right )}^n\right ) \,d x \] Input:
int(log(a*(1/sin(x))^n),x)
Output:
int(log(a*(1/sin(x))^n), x)
\[ \int \log \left (a \csc ^n(x)\right ) \, dx=\int \mathrm {log}\left (\csc \left (x \right )^{n} a \right )d x \] Input:
int(log(a*csc(x)^n),x)
Output:
int(log(csc(x)**n*a),x)