\(\int x \cosh (b x) \text {Chi}(b x) \, dx\) [111]

Optimal result

Integrand size = 10, antiderivative size = 61 \[ \int x \cosh (b x) \text {Chi}(b x) \, dx=-\frac {\cosh (b x) \text {Chi}(b x)}{b^2}+\frac {\text {Chi}(2 b x)}{2 b^2}+\frac {\log (x)}{2 b^2}+\frac {x \text {Chi}(b x) \sinh (b x)}{b}-\frac {\sinh ^2(b x)}{2 b^2} \]

[Out]

1/2*Chi(2*b*x)/b^2-Chi(b*x)*cosh(b*x)/b^2+1/2*ln(x)/b^2+x*Chi(b*x)*sinh(b*x)/b-1/2*sinh(b*x)^2/b^2

Rubi [A] (verified)

Time = 0.09 (sec) , antiderivative size = 61, normalized size of antiderivative = 1.00, number of steps used = 9, number of rules used = 7, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.700, Rules used = {6678, 12, 2644, 30, 6682, 3393, 3382} \[ \int x \cosh (b x) \text {Chi}(b x) \, dx=\frac {\text {Chi}(2 b x)}{2 b^2}-\frac {\text {Chi}(b x) \cosh (b x)}{b^2}+\frac {\log (x)}{2 b^2}-\frac {\sinh ^2(b x)}{2 b^2}+\frac {x \text {Chi}(b x) \sinh (b x)}{b} \]

[In]

Int[x*Cosh[b*x]*CoshIntegral[b*x],x]

[Out]

-((Cosh[b*x]*CoshIntegral[b*x])/b^2) + CoshIntegral[2*b*x]/(2*b^2) + Log[x]/(2*b^2) + (x*CoshIntegral[b*x]*Sin
h[b*x])/b - Sinh[b*x]^2/(2*b^2)

Rule 12

Int[(a_)*(u_), x_Symbol] :> Dist[a, Int[u, x], x] /; FreeQ[a, x] &&  !MatchQ[u, (b_)*(v_) /; FreeQ[b, x]]

Rule 30

Int[(x_)^(m_.), x_Symbol] :> Simp[x^(m + 1)/(m + 1), x] /; FreeQ[m, x] && NeQ[m, -1]

Rule 2644

Int[cos[(e_.) + (f_.)*(x_)]^(n_.)*((a_.)*sin[(e_.) + (f_.)*(x_)])^(m_.), x_Symbol] :> Dist[1/(a*f), Subst[Int[
x^m*(1 - x^2/a^2)^((n - 1)/2), x], x, a*Sin[e + f*x]], x] /; FreeQ[{a, e, f, m}, x] && IntegerQ[(n - 1)/2] &&
!(IntegerQ[(m - 1)/2] && LtQ[0, m, n])

Rule 3382

Int[sin[(e_.) + (Complex[0, fz_])*(f_.)*(x_)]/((c_.) + (d_.)*(x_)), x_Symbol] :> Simp[CoshIntegral[c*f*(fz/d)
+ f*fz*x]/d, x] /; FreeQ[{c, d, e, f, fz}, x] && EqQ[d*(e - Pi/2) - c*f*fz*I, 0]

Rule 3393

Int[((c_.) + (d_.)*(x_))^(m_)*sin[(e_.) + (f_.)*(x_)]^(n_), x_Symbol] :> Int[ExpandTrigReduce[(c + d*x)^m, Sin
[e + f*x]^n, x], x] /; FreeQ[{c, d, e, f, m}, x] && IGtQ[n, 1] && ( !RationalQ[m] || (GeQ[m, -1] && LtQ[m, 1])
)

Rule 6678

Int[Cosh[(a_.) + (b_.)*(x_)]*CoshIntegral[(c_.) + (d_.)*(x_)]*((e_.) + (f_.)*(x_))^(m_.), x_Symbol] :> Simp[(e
+ f*x)^m*Sinh[a + b*x]*(CoshIntegral[c + d*x]/b), x] + (-Dist[d/b, Int[(e + f*x)^m*Sinh[a + b*x]*(Cosh[c + d*
x]/(c + d*x)), x], x] - Dist[f*(m/b), Int[(e + f*x)^(m - 1)*Sinh[a + b*x]*CoshIntegral[c + d*x], x], x]) /; Fr
eeQ[{a, b, c, d, e, f}, x] && IGtQ[m, 0]

Rule 6682

Int[CoshIntegral[(c_.) + (d_.)*(x_)]*Sinh[(a_.) + (b_.)*(x_)], x_Symbol] :> Simp[Cosh[a + b*x]*(CoshIntegral[c
+ d*x]/b), x] - Dist[d/b, Int[Cosh[a + b*x]*(Cosh[c + d*x]/(c + d*x)), x], x] /; FreeQ[{a, b, c, d}, x]

Rubi steps \begin{align*} \text {integral}& = \frac {x \text {Chi}(b x) \sinh (b x)}{b}-\frac {\int \text {Chi}(b x) \sinh (b x) \, dx}{b}-\int \frac {\cosh (b x) \sinh (b x)}{b} \, dx \\ & = -\frac {\cosh (b x) \text {Chi}(b x)}{b^2}+\frac {x \text {Chi}(b x) \sinh (b x)}{b}+\frac {\int \frac {\cosh ^2(b x)}{b x} \, dx}{b}-\frac {\int \cosh (b x) \sinh (b x) \, dx}{b} \\ & = -\frac {\cosh (b x) \text {Chi}(b x)}{b^2}+\frac {x \text {Chi}(b x) \sinh (b x)}{b}+\frac {\int \frac {\cosh ^2(b x)}{x} \, dx}{b^2}+\frac {\text {Subst}(\int x \, dx,x,i \sinh (b x))}{b^2} \\ & = -\frac {\cosh (b x) \text {Chi}(b x)}{b^2}+\frac {x \text {Chi}(b x) \sinh (b x)}{b}-\frac {\sinh ^2(b x)}{2 b^2}+\frac {\int \left (\frac {1}{2 x}+\frac {\cosh (2 b x)}{2 x}\right ) \, dx}{b^2} \\ & = -\frac {\cosh (b x) \text {Chi}(b x)}{b^2}+\frac {\log (x)}{2 b^2}+\frac {x \text {Chi}(b x) \sinh (b x)}{b}-\frac {\sinh ^2(b x)}{2 b^2}+\frac {\int \frac {\cosh (2 b x)}{x} \, dx}{2 b^2} \\ & = -\frac {\cosh (b x) \text {Chi}(b x)}{b^2}+\frac {\text {Chi}(2 b x)}{2 b^2}+\frac {\log (x)}{2 b^2}+\frac {x \text {Chi}(b x) \sinh (b x)}{b}-\frac {\sinh ^2(b x)}{2 b^2} \\ \end{align*}

Mathematica [A] (verified)

Time = 0.03 (sec) , antiderivative size = 46, normalized size of antiderivative = 0.75 \[ \int x \cosh (b x) \text {Chi}(b x) \, dx=\frac {-\cosh (2 b x)+2 \text {Chi}(2 b x)+2 \log (x)+4 \text {Chi}(b x) (-\cosh (b x)+b x \sinh (b x))}{4 b^2} \]

[In]

Integrate[x*Cosh[b*x]*CoshIntegral[b*x],x]

[Out]

(-Cosh[2*b*x] + 2*CoshIntegral[2*b*x] + 2*Log[x] + 4*CoshIntegral[b*x]*(-Cosh[b*x] + b*x*Sinh[b*x]))/(4*b^2)

Maple [A] (verified)

Time = 0.71 (sec) , antiderivative size = 46, normalized size of antiderivative = 0.75

method	result	size
derivativedivides	\(\frac {\operatorname {Chi}\left (b x \right ) \left (b x \sinh \left (b x \right )-\cosh \left (b x \right )\right )-\frac {\cosh \left (b x \right )^{2}}{2}+\frac {\ln \left (b x \right )}{2}+\frac {\operatorname {Chi}\left (2 b x \right )}{2}}{b^{2}}\)	\(46\)
default	\(\frac {\operatorname {Chi}\left (b x \right ) \left (b x \sinh \left (b x \right )-\cosh \left (b x \right )\right )-\frac {\cosh \left (b x \right )^{2}}{2}+\frac {\ln \left (b x \right )}{2}+\frac {\operatorname {Chi}\left (2 b x \right )}{2}}{b^{2}}\)	\(46\)

[In]

int(x*Chi(b*x)*cosh(b*x),x,method=_RETURNVERBOSE)

[Out]

1/b^2*(Chi(b*x)*(b*x*sinh(b*x)-cosh(b*x))-1/2*cosh(b*x)^2+1/2*ln(b*x)+1/2*Chi(2*b*x))

Fricas [F]

\[ \int x \cosh (b x) \text {Chi}(b x) \, dx=\int { x {\rm Chi}\left (b x\right ) \cosh \left (b x\right ) \,d x } \]

[In]

integrate(x*Chi(b*x)*cosh(b*x),x, algorithm="fricas")

[Out]

integral(x*cosh(b*x)*cosh_integral(b*x), x)

Sympy [F]

\[ \int x \cosh (b x) \text {Chi}(b x) \, dx=\int x \cosh {\left (b x \right )} \operatorname {Chi}\left (b x\right )\, dx \]

[In]

integrate(x*Chi(b*x)*cosh(b*x),x)

[Out]

Integral(x*cosh(b*x)*Chi(b*x), x)

Maxima [F]

\[ \int x \cosh (b x) \text {Chi}(b x) \, dx=\int { x {\rm Chi}\left (b x\right ) \cosh \left (b x\right ) \,d x } \]

[In]

integrate(x*Chi(b*x)*cosh(b*x),x, algorithm="maxima")

[Out]

integrate(x*Chi(b*x)*cosh(b*x), x)

Giac [F]

\[ \int x \cosh (b x) \text {Chi}(b x) \, dx=\int { x {\rm Chi}\left (b x\right ) \cosh \left (b x\right ) \,d x } \]

[In]

integrate(x*Chi(b*x)*cosh(b*x),x, algorithm="giac")

[Out]

integrate(x*Chi(b*x)*cosh(b*x), x)

Mupad [F(-1)]

Timed out. \[ \int x \cosh (b x) \text {Chi}(b x) \, dx=\int x\,\mathrm {coshint}\left (b\,x\right )\,\mathrm {cosh}\left (b\,x\right ) \,d x \]

[In]

int(x*coshint(b*x)*cosh(b*x),x)

[Out]

int(x*coshint(b*x)*cosh(b*x), x)