Integrand size = 10, antiderivative size = 73 \[ \int \frac {\arccos (a x)^2}{x} \, dx=-\frac {1}{3} i \arccos (a x)^3+\arccos (a x)^2 \log \left (1+e^{2 i \arccos (a x)}\right )-i \arccos (a x) \operatorname {PolyLog}\left (2,-e^{2 i \arccos (a x)}\right )+\frac {1}{2} \operatorname {PolyLog}\left (3,-e^{2 i \arccos (a x)}\right ) \]
-1/3*I*arccos(a*x)^3+arccos(a*x)^2*ln(1+(a*x+I*(-a^2*x^2+1)^(1/2))^2)-I*ar ccos(a*x)*polylog(2,-(a*x+I*(-a^2*x^2+1)^(1/2))^2)+1/2*polylog(3,-(a*x+I*( -a^2*x^2+1)^(1/2))^2)
Time = 0.02 (sec) , antiderivative size = 73, normalized size of antiderivative = 1.00 \[ \int \frac {\arccos (a x)^2}{x} \, dx=-\frac {1}{3} i \arccos (a x)^3+\arccos (a x)^2 \log \left (1+e^{2 i \arccos (a x)}\right )-i \arccos (a x) \operatorname {PolyLog}\left (2,-e^{2 i \arccos (a x)}\right )+\frac {1}{2} \operatorname {PolyLog}\left (3,-e^{2 i \arccos (a x)}\right ) \]
(-1/3*I)*ArcCos[a*x]^3 + ArcCos[a*x]^2*Log[1 + E^((2*I)*ArcCos[a*x])] - I* ArcCos[a*x]*PolyLog[2, -E^((2*I)*ArcCos[a*x])] + PolyLog[3, -E^((2*I)*ArcC os[a*x])]/2
Time = 0.42 (sec) , antiderivative size = 90, normalized size of antiderivative = 1.23, number of steps used = 8, number of rules used = 7, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.700, Rules used = {5137, 3042, 4202, 2620, 3011, 2720, 7143}
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.
\(\displaystyle \int \frac {\arccos (a x)^2}{x} \, dx\) |
\(\Big \downarrow \) 5137 |
\(\displaystyle -\int \frac {\sqrt {1-a^2 x^2} \arccos (a x)^2}{a x}d\arccos (a x)\) |
\(\Big \downarrow \) 3042 |
\(\displaystyle -\int \arccos (a x)^2 \tan (\arccos (a x))d\arccos (a x)\) |
\(\Big \downarrow \) 4202 |
\(\displaystyle 2 i \int \frac {e^{2 i \arccos (a x)} \arccos (a x)^2}{1+e^{2 i \arccos (a x)}}d\arccos (a x)-\frac {1}{3} i \arccos (a x)^3\) |
\(\Big \downarrow \) 2620 |
\(\displaystyle 2 i \left (i \int \arccos (a x) \log \left (1+e^{2 i \arccos (a x)}\right )d\arccos (a x)-\frac {1}{2} i \arccos (a x)^2 \log \left (1+e^{2 i \arccos (a x)}\right )\right )-\frac {1}{3} i \arccos (a x)^3\) |
\(\Big \downarrow \) 3011 |
\(\displaystyle 2 i \left (i \left (\frac {1}{2} i \arccos (a x) \operatorname {PolyLog}\left (2,-e^{2 i \arccos (a x)}\right )-\frac {1}{2} i \int \operatorname {PolyLog}\left (2,-e^{2 i \arccos (a x)}\right )d\arccos (a x)\right )-\frac {1}{2} i \arccos (a x)^2 \log \left (1+e^{2 i \arccos (a x)}\right )\right )-\frac {1}{3} i \arccos (a x)^3\) |
\(\Big \downarrow \) 2720 |
\(\displaystyle 2 i \left (i \left (\frac {1}{2} i \arccos (a x) \operatorname {PolyLog}\left (2,-e^{2 i \arccos (a x)}\right )-\frac {1}{4} \int e^{-2 i \arccos (a x)} \operatorname {PolyLog}\left (2,-e^{2 i \arccos (a x)}\right )de^{2 i \arccos (a x)}\right )-\frac {1}{2} i \arccos (a x)^2 \log \left (1+e^{2 i \arccos (a x)}\right )\right )-\frac {1}{3} i \arccos (a x)^3\) |
\(\Big \downarrow \) 7143 |
\(\displaystyle 2 i \left (i \left (\frac {1}{2} i \arccos (a x) \operatorname {PolyLog}\left (2,-e^{2 i \arccos (a x)}\right )-\frac {1}{4} \operatorname {PolyLog}\left (3,-e^{2 i \arccos (a x)}\right )\right )-\frac {1}{2} i \arccos (a x)^2 \log \left (1+e^{2 i \arccos (a x)}\right )\right )-\frac {1}{3} i \arccos (a x)^3\) |
(-1/3*I)*ArcCos[a*x]^3 + (2*I)*((-1/2*I)*ArcCos[a*x]^2*Log[1 + E^((2*I)*Ar cCos[a*x])] + I*((I/2)*ArcCos[a*x]*PolyLog[2, -E^((2*I)*ArcCos[a*x])] - Po lyLog[3, -E^((2*I)*ArcCos[a*x])]/4))
3.1.17.3.1 Defintions of rubi rules used
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[u_, x_Symbol] :> With[{v = FunctionOfExponential[u, x]}, Simp[v/D[v, x] Subst[Int[FunctionOfExponentialFunction[u, x]/x, x], x, v], x]] /; Funct ionOfExponentialQ[u, x] && !MatchQ[u, (w_)*((a_.)*(v_)^(n_))^(m_) /; FreeQ [{a, m, n}, x] && IntegerQ[m*n]] && !MatchQ[u, E^((c_.)*((a_.) + (b_.)*x)) *(F_)[v_] /; FreeQ[{a, b, c}, x] && InverseFunctionQ[F[x]]]
Int[Log[1 + (e_.)*((F_)^((c_.)*((a_.) + (b_.)*(x_))))^(n_.)]*((f_.) + (g_.) *(x_))^(m_.), x_Symbol] :> Simp[(-(f + g*x)^m)*(PolyLog[2, (-e)*(F^(c*(a + b*x)))^n]/(b*c*n*Log[F])), x] + Simp[g*(m/(b*c*n*Log[F])) Int[(f + g*x)^( m - 1)*PolyLog[2, (-e)*(F^(c*(a + b*x)))^n], x], x] /; FreeQ[{F, a, b, c, e , f, g, n}, x] && GtQ[m, 0]
Int[((c_.) + (d_.)*(x_))^(m_.)*tan[(e_.) + (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*( e + f*x))/(1 + E^(2*I*(e + f*x)))), x], x] /; FreeQ[{c, d, e, f}, x] && IGt Q[m, 0]
Int[((a_.) + ArcCos[(c_.)*(x_)]*(b_.))^(n_.)/(x_), x_Symbol] :> -Subst[Int[ (a + b*x)^n*Tan[x], x], x, ArcCos[c*x]] /; FreeQ[{a, b, c}, x] && IGtQ[n, 0 ]
Int[PolyLog[n_, (c_.)*((a_.) + (b_.)*(x_))^(p_.)]/((d_.) + (e_.)*(x_)), x_S ymbol] :> Simp[PolyLog[n + 1, c*(a + b*x)^p]/(e*p), x] /; FreeQ[{a, b, c, d , e, n, p}, x] && EqQ[b*d, a*e]
Time = 0.64 (sec) , antiderivative size = 101, normalized size of antiderivative = 1.38
method | result | size |
derivativedivides | \(-\frac {i \arccos \left (a x \right )^{3}}{3}+\arccos \left (a x \right )^{2} \ln \left (1+\left (i \sqrt {-a^{2} x^{2}+1}+a x \right )^{2}\right )-i \arccos \left (a x \right ) \operatorname {polylog}\left (2, -\left (i \sqrt {-a^{2} x^{2}+1}+a x \right )^{2}\right )+\frac {\operatorname {polylog}\left (3, -\left (i \sqrt {-a^{2} x^{2}+1}+a x \right )^{2}\right )}{2}\) | \(101\) |
default | \(-\frac {i \arccos \left (a x \right )^{3}}{3}+\arccos \left (a x \right )^{2} \ln \left (1+\left (i \sqrt {-a^{2} x^{2}+1}+a x \right )^{2}\right )-i \arccos \left (a x \right ) \operatorname {polylog}\left (2, -\left (i \sqrt {-a^{2} x^{2}+1}+a x \right )^{2}\right )+\frac {\operatorname {polylog}\left (3, -\left (i \sqrt {-a^{2} x^{2}+1}+a x \right )^{2}\right )}{2}\) | \(101\) |
-1/3*I*arccos(a*x)^3+arccos(a*x)^2*ln(1+(I*(-a^2*x^2+1)^(1/2)+a*x)^2)-I*ar ccos(a*x)*polylog(2,-(I*(-a^2*x^2+1)^(1/2)+a*x)^2)+1/2*polylog(3,-(I*(-a^2 *x^2+1)^(1/2)+a*x)^2)
\[ \int \frac {\arccos (a x)^2}{x} \, dx=\int { \frac {\arccos \left (a x\right )^{2}}{x} \,d x } \]
\[ \int \frac {\arccos (a x)^2}{x} \, dx=\int \frac {\operatorname {acos}^{2}{\left (a x \right )}}{x}\, dx \]
\[ \int \frac {\arccos (a x)^2}{x} \, dx=\int { \frac {\arccos \left (a x\right )^{2}}{x} \,d x } \]
\[ \int \frac {\arccos (a x)^2}{x} \, dx=\int { \frac {\arccos \left (a x\right )^{2}}{x} \,d x } \]
Timed out. \[ \int \frac {\arccos (a x)^2}{x} \, dx=\int \frac {{\mathrm {acos}\left (a\,x\right )}^2}{x} \,d x \]