Integrand size = 18, antiderivative size = 82 \[ \int \cot ^{-1}(c-(i-c) \tanh (a+b x)) \, dx=-\frac {1}{2} i b x^2+x \cot ^{-1}(c-(i-c) \tanh (a+b x))+\frac {1}{2} i x \log \left (1-i c e^{2 a+2 b x}\right )+\frac {i \operatorname {PolyLog}\left (2,i c e^{2 a+2 b x}\right )}{4 b} \]
-1/2*I*b*x^2+x*arccot(c-(I-c)*tanh(b*x+a))+1/2*I*x*ln(1-I*c*exp(2*b*x+2*a) )+1/4*I*polylog(2,I*c*exp(2*b*x+2*a))/b
Time = 0.09 (sec) , antiderivative size = 71, normalized size of antiderivative = 0.87 \[ \int \cot ^{-1}(c-(i-c) \tanh (a+b x)) \, dx=x \cot ^{-1}(c+(-i+c) \tanh (a+b x))+\frac {i \left (2 b x \log \left (1+\frac {i e^{-2 (a+b x)}}{c}\right )-\operatorname {PolyLog}\left (2,-\frac {i e^{-2 (a+b x)}}{c}\right )\right )}{4 b} \]
x*ArcCot[c + (-I + c)*Tanh[a + b*x]] + ((I/4)*(2*b*x*Log[1 + I/(c*E^(2*(a + b*x)))] - PolyLog[2, (-I)/(c*E^(2*(a + b*x)))]))/b
Time = 0.42 (sec) , antiderivative size = 95, normalized size of antiderivative = 1.16, number of steps used = 6, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.278, Rules used = {5711, 2615, 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.
| \(\displaystyle \int \cot ^{-1}(c-(-c+i) \tanh (a+b x)) \, dx\) |
| \(\Big \downarrow \) 5711 |
| \(\displaystyle b \int \frac {x}{e^{2 a+2 b x} c+i}dx+x \cot ^{-1}(c-(-c+i) \tanh (a+b x))\) |
| \(\Big \downarrow \) 2615 |
| \(\displaystyle b \left (i c \int \frac {e^{2 a+2 b x} x}{e^{2 a+2 b x} c+i}dx-\frac {i x^2}{2}\right )+x \cot ^{-1}(c-(-c+i) \tanh (a+b x))\) |
| \(\Big \downarrow \) 2620 |
| \(\displaystyle b \left (i c \left (\frac {x \log \left (1-i c e^{2 a+2 b x}\right )}{2 b c}-\frac {\int \log \left (1-i c e^{2 a+2 b x}\right )dx}{2 b c}\right )-\frac {i x^2}{2}\right )+x \cot ^{-1}(c-(-c+i) \tanh (a+b x))\) |
| \(\Big \downarrow \) 2715 |
| \(\displaystyle b \left (i c \left (\frac {x \log \left (1-i c e^{2 a+2 b x}\right )}{2 b c}-\frac {\int e^{-2 a-2 b x} \log \left (1-i c e^{2 a+2 b x}\right )de^{2 a+2 b x}}{4 b^2 c}\right )-\frac {i x^2}{2}\right )+x \cot ^{-1}(c-(-c+i) \tanh (a+b x))\) |
| \(\Big \downarrow \) 2838 |
| \(\displaystyle b \left (i c \left (\frac {\operatorname {PolyLog}\left (2,i c e^{2 a+2 b x}\right )}{4 b^2 c}+\frac {x \log \left (1-i c e^{2 a+2 b x}\right )}{2 b c}\right )-\frac {i x^2}{2}\right )+x \cot ^{-1}(c-(-c+i) \tanh (a+b x))\) |
x*ArcCot[c - (I - c)*Tanh[a + b*x]] + b*((-1/2*I)*x^2 + I*c*((x*Log[1 - I* c*E^(2*a + 2*b*x)])/(2*b*c) + PolyLog[2, I*c*E^(2*a + 2*b*x)]/(4*b^2*c)))
3.2.98.3.1 Defintions of rubi rules used
Int[((c_.) + (d_.)*(x_))^(m_.)/((a_) + (b_.)*((F_)^((g_.)*((e_.) + (f_.)*(x _))))^(n_.)), x_Symbol] :> Simp[(c + d*x)^(m + 1)/(a*d*(m + 1)), x] - Simp[ b/a Int[(c + d*x)^m*((F^(g*(e + f*x)))^n/(a + b*(F^(g*(e + f*x)))^n)), x] , x] /; FreeQ[{F, a, b, c, d, e, f, g, n}, x] && IGtQ[m, 0]
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[ArcCot[(c_.) + (d_.)*Tanh[(a_.) + (b_.)*(x_)]], x_Symbol] :> Simp[x*Arc Cot[c + d*Tanh[a + b*x]], x] + Simp[b Int[x/(c - d + c*E^(2*a + 2*b*x)), x], x] /; FreeQ[{a, b, c, d}, x] && EqQ[(c - d)^2, -1]
Both result and optimal contain complex but leaf count of result is larger than twice the leaf count of optimal. 516 vs. \(2 (68 ) = 136\).
Time = 1.86 (sec) , antiderivative size = 517, normalized size of antiderivative = 6.30
| method | result | size |
| derivativedivides | \(\frac {-\frac {\operatorname {arccot}\left (c +\tanh \left (b x +a \right ) \left (c -i\right )\right ) \ln \left (\tanh \left (b x +a \right ) \left (c -i\right )-c +i\right )}{2 i-2 c}-\frac {2 i \operatorname {arccot}\left (c +\tanh \left (b x +a \right ) \left (c -i\right )\right ) \ln \left (\tanh \left (b x +a \right ) \left (c -i\right )-c +i\right ) c}{2 i-2 c}+\frac {\operatorname {arccot}\left (c +\tanh \left (b x +a \right ) \left (c -i\right )\right ) \ln \left (\tanh \left (b x +a \right ) \left (c -i\right )-c +i\right ) c^{2}}{2 i-2 c}+\frac {\operatorname {arccot}\left (c +\tanh \left (b x +a \right ) \left (c -i\right )\right ) \ln \left (-i+\tanh \left (b x +a \right ) \left (c -i\right )+c \right )}{2 i-2 c}+\frac {2 i \operatorname {arccot}\left (c +\tanh \left (b x +a \right ) \left (c -i\right )\right ) \ln \left (-i+\tanh \left (b x +a \right ) \left (c -i\right )+c \right ) c}{2 i-2 c}-\frac {\operatorname {arccot}\left (c +\tanh \left (b x +a \right ) \left (c -i\right )\right ) \ln \left (-i+\tanh \left (b x +a \right ) \left (c -i\right )+c \right ) c^{2}}{2 i-2 c}-\left (i-c \right )^{2} \left (\frac {-\frac {i \ln \left (-i+\tanh \left (b x +a \right ) \left (c -i\right )+c \right )^{2}}{4}+\frac {i \left (\operatorname {dilog}\left (-\frac {i \left (\tanh \left (b x +a \right ) \left (c -i\right )+c +i\right )}{2}\right )+\ln \left (-i+\tanh \left (b x +a \right ) \left (c -i\right )+c \right ) \ln \left (-\frac {i \left (\tanh \left (b x +a \right ) \left (c -i\right )+c +i\right )}{2}\right )\right )}{2}}{2 i-2 c}-\frac {-\frac {i \left (\operatorname {dilog}\left (\frac {-i+\tanh \left (b x +a \right ) \left (c -i\right )+c}{-2 i+2 c}\right )+\ln \left (\tanh \left (b x +a \right ) \left (c -i\right )-c +i\right ) \ln \left (\frac {-i+\tanh \left (b x +a \right ) \left (c -i\right )+c}{-2 i+2 c}\right )\right )}{2}+\frac {i \left (\operatorname {dilog}\left (\frac {\tanh \left (b x +a \right ) \left (c -i\right )+c +i}{2 c}\right )+\ln \left (\tanh \left (b x +a \right ) \left (c -i\right )-c +i\right ) \ln \left (\frac {\tanh \left (b x +a \right ) \left (c -i\right )+c +i}{2 c}\right )\right )}{2}}{2 \left (i-c \right )}\right )}{b \left (c -i\right )}\) | \(517\) |
| default | \(\frac {-\frac {\operatorname {arccot}\left (c +\tanh \left (b x +a \right ) \left (c -i\right )\right ) \ln \left (\tanh \left (b x +a \right ) \left (c -i\right )-c +i\right )}{2 i-2 c}-\frac {2 i \operatorname {arccot}\left (c +\tanh \left (b x +a \right ) \left (c -i\right )\right ) \ln \left (\tanh \left (b x +a \right ) \left (c -i\right )-c +i\right ) c}{2 i-2 c}+\frac {\operatorname {arccot}\left (c +\tanh \left (b x +a \right ) \left (c -i\right )\right ) \ln \left (\tanh \left (b x +a \right ) \left (c -i\right )-c +i\right ) c^{2}}{2 i-2 c}+\frac {\operatorname {arccot}\left (c +\tanh \left (b x +a \right ) \left (c -i\right )\right ) \ln \left (-i+\tanh \left (b x +a \right ) \left (c -i\right )+c \right )}{2 i-2 c}+\frac {2 i \operatorname {arccot}\left (c +\tanh \left (b x +a \right ) \left (c -i\right )\right ) \ln \left (-i+\tanh \left (b x +a \right ) \left (c -i\right )+c \right ) c}{2 i-2 c}-\frac {\operatorname {arccot}\left (c +\tanh \left (b x +a \right ) \left (c -i\right )\right ) \ln \left (-i+\tanh \left (b x +a \right ) \left (c -i\right )+c \right ) c^{2}}{2 i-2 c}-\left (i-c \right )^{2} \left (\frac {-\frac {i \ln \left (-i+\tanh \left (b x +a \right ) \left (c -i\right )+c \right )^{2}}{4}+\frac {i \left (\operatorname {dilog}\left (-\frac {i \left (\tanh \left (b x +a \right ) \left (c -i\right )+c +i\right )}{2}\right )+\ln \left (-i+\tanh \left (b x +a \right ) \left (c -i\right )+c \right ) \ln \left (-\frac {i \left (\tanh \left (b x +a \right ) \left (c -i\right )+c +i\right )}{2}\right )\right )}{2}}{2 i-2 c}-\frac {-\frac {i \left (\operatorname {dilog}\left (\frac {-i+\tanh \left (b x +a \right ) \left (c -i\right )+c}{-2 i+2 c}\right )+\ln \left (\tanh \left (b x +a \right ) \left (c -i\right )-c +i\right ) \ln \left (\frac {-i+\tanh \left (b x +a \right ) \left (c -i\right )+c}{-2 i+2 c}\right )\right )}{2}+\frac {i \left (\operatorname {dilog}\left (\frac {\tanh \left (b x +a \right ) \left (c -i\right )+c +i}{2 c}\right )+\ln \left (\tanh \left (b x +a \right ) \left (c -i\right )-c +i\right ) \ln \left (\frac {\tanh \left (b x +a \right ) \left (c -i\right )+c +i}{2 c}\right )\right )}{2}}{2 \left (i-c \right )}\right )}{b \left (c -i\right )}\) | \(517\) |
| risch | \(\text {Expression too large to display}\) | \(1229\) |
1/b/(c-I)*(-arccot(c+tanh(b*x+a)*(c-I))/(2*I-2*c)*ln(tanh(b*x+a)*(c-I)-c+I )-2*I*arccot(c+tanh(b*x+a)*(c-I))/(2*I-2*c)*ln(tanh(b*x+a)*(c-I)-c+I)*c+ar ccot(c+tanh(b*x+a)*(c-I))/(2*I-2*c)*ln(tanh(b*x+a)*(c-I)-c+I)*c^2+arccot(c +tanh(b*x+a)*(c-I))/(2*I-2*c)*ln(-I+tanh(b*x+a)*(c-I)+c)+2*I*arccot(c+tanh (b*x+a)*(c-I))/(2*I-2*c)*ln(-I+tanh(b*x+a)*(c-I)+c)*c-arccot(c+tanh(b*x+a) *(c-I))/(2*I-2*c)*ln(-I+tanh(b*x+a)*(c-I)+c)*c^2-(I-c)^2*(1/2/(I-c)*(-1/4* I*ln(-I+tanh(b*x+a)*(c-I)+c)^2+1/2*I*(dilog(-1/2*I*(tanh(b*x+a)*(c-I)+c+I) )+ln(-I+tanh(b*x+a)*(c-I)+c)*ln(-1/2*I*(tanh(b*x+a)*(c-I)+c+I))))-1/2/(I-c )*(1/2*I*(dilog(1/2*(tanh(b*x+a)*(c-I)+c+I)/c)+ln(tanh(b*x+a)*(c-I)-c+I)*l n(1/2*(tanh(b*x+a)*(c-I)+c+I)/c))-1/2*I*(dilog((-I+tanh(b*x+a)*(c-I)+c)/(- 2*I+2*c))+ln(tanh(b*x+a)*(c-I)-c+I)*ln((-I+tanh(b*x+a)*(c-I)+c)/(-2*I+2*c) )))))
Both result and optimal contain complex but leaf count of result is larger than twice the leaf count of optimal. 186 vs. \(2 (58) = 116\).
Time = 0.27 (sec) , antiderivative size = 186, normalized size of antiderivative = 2.27 \[ \int \cot ^{-1}(c-(i-c) \tanh (a+b x)) \, dx=\frac {-i \, b^{2} x^{2} + i \, b x \log \left (\frac {{\left (c - i\right )} e^{\left (2 \, b x + 2 \, a\right )}}{c e^{\left (2 \, b x + 2 \, a\right )} + i}\right ) + i \, a^{2} + {\left (i \, b x + i \, a\right )} \log \left (\frac {1}{2} \, \sqrt {4 i \, c} e^{\left (b x + a\right )} + 1\right ) + {\left (i \, b x + i \, a\right )} \log \left (-\frac {1}{2} \, \sqrt {4 i \, c} e^{\left (b x + a\right )} + 1\right ) - i \, a \log \left (\frac {2 \, c e^{\left (b x + a\right )} + i \, \sqrt {4 i \, c}}{2 \, c}\right ) - i \, a \log \left (\frac {2 \, c e^{\left (b x + a\right )} - i \, \sqrt {4 i \, c}}{2 \, c}\right ) + i \, {\rm Li}_2\left (\frac {1}{2} \, \sqrt {4 i \, c} e^{\left (b x + a\right )}\right ) + i \, {\rm Li}_2\left (-\frac {1}{2} \, \sqrt {4 i \, c} e^{\left (b x + a\right )}\right )}{2 \, b} \]
1/2*(-I*b^2*x^2 + I*b*x*log((c - I)*e^(2*b*x + 2*a)/(c*e^(2*b*x + 2*a) + I )) + I*a^2 + (I*b*x + I*a)*log(1/2*sqrt(4*I*c)*e^(b*x + a) + 1) + (I*b*x + I*a)*log(-1/2*sqrt(4*I*c)*e^(b*x + a) + 1) - I*a*log(1/2*(2*c*e^(b*x + a) + I*sqrt(4*I*c))/c) - I*a*log(1/2*(2*c*e^(b*x + a) - I*sqrt(4*I*c))/c) + I*dilog(1/2*sqrt(4*I*c)*e^(b*x + a)) + I*dilog(-1/2*sqrt(4*I*c)*e^(b*x + a )))/b
Exception generated. \[ \int \cot ^{-1}(c-(i-c) \tanh (a+b x)) \, dx=\text {Exception raised: CoercionFailed} \]
Exception raised: CoercionFailed >> Cannot convert 2*_t0**2*c*exp(2*a) - _ t0**2*I*exp(2*a) + I of type <class 'sympy.core.add.Add'> to QQ_I[b,c,_t0, exp(a)]
Time = 1.28 (sec) , antiderivative size = 80, normalized size of antiderivative = 0.98 \[ \int \cot ^{-1}(c-(i-c) \tanh (a+b x)) \, dx=2 \, b {\left (c - i\right )} {\left (\frac {2 \, x^{2}}{2 i \, c + 2} - \frac {2 \, b x \log \left (-i \, c e^{\left (2 \, b x + 2 \, a\right )} + 1\right ) + {\rm Li}_2\left (i \, c e^{\left (2 \, b x + 2 \, a\right )}\right )}{-2 \, b^{2} {\left (-i \, c - 1\right )}}\right )} + x \operatorname {arccot}\left ({\left (c - i\right )} \tanh \left (b x + a\right ) + c\right ) \]
2*b*(c - I)*(2*x^2/(2*I*c + 2) - (2*b*x*log(-I*c*e^(2*b*x + 2*a) + 1) + di log(I*c*e^(2*b*x + 2*a)))/(b^2*(2*I*c + 2))) + x*arccot((c - I)*tanh(b*x + a) + c)
\[ \int \cot ^{-1}(c-(i-c) \tanh (a+b x)) \, dx=\int { \operatorname {arccot}\left ({\left (c - i\right )} \tanh \left (b x + a\right ) + c\right ) \,d x } \]
Timed out. \[ \int \cot ^{-1}(c-(i-c) \tanh (a+b x)) \, dx=\int \mathrm {acot}\left (c+\mathrm {tanh}\left (a+b\,x\right )\,\left (c-\mathrm {i}\right )\right ) \,d x \]