3.2.55 \(\int \log (x) \sin ^2(a+b x) \, dx\) [155]

Optimal. Leaf size=66 \[ -\frac {x}{2}+\frac {1}{2} x \log (x)+\frac {\text {Ci}(2 b x) \sin (2 a)}{4 b}-\frac {\cos (a+b x) \log (x) \sin (a+b x)}{2 b}+\frac {\cos (2 a) \text {Si}(2 b x)}{4 b} \]

[Out]

-1/2*x+1/2*x*ln(x)+1/4*cos(2*a)*Si(2*b*x)/b+1/4*Ci(2*b*x)*sin(2*a)/b-1/2*cos(b*x+a)*ln(x)*sin(b*x+a)/b

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Rubi [A]
time = 0.08, antiderivative size = 66, normalized size of antiderivative = 1.00, number of steps used = 5, number of rules used = 6, integrand size = 11, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.546, Rules used = {2715, 8, 2634, 3384, 3380, 3383} \begin {gather*} \frac {\sin (2 a) \text {CosIntegral}(2 b x)}{4 b}+\frac {\cos (2 a) \text {Si}(2 b x)}{4 b}-\frac {\log (x) \sin (a+b x) \cos (a+b x)}{2 b}-\frac {x}{2}+\frac {1}{2} x \log (x) \end {gather*}

Antiderivative was successfully verified.

[In]

Int[Log[x]*Sin[a + b*x]^2,x]

[Out]

-1/2*x + (x*Log[x])/2 + (CosIntegral[2*b*x]*Sin[2*a])/(4*b) - (Cos[a + b*x]*Log[x]*Sin[a + b*x])/(2*b) + (Cos[
2*a]*SinIntegral[2*b*x])/(4*b)

Rule 8

Int[a_, x_Symbol] :> Simp[a*x, x] /; FreeQ[a, x]

Rule 2634

Int[Log[u_]*(v_), x_Symbol] :> With[{w = IntHide[v, x]}, Dist[Log[u], w, x] - Int[SimplifyIntegrand[w*(D[u, x]
/u), x], x] /; InverseFunctionFreeQ[w, x]] /; InverseFunctionFreeQ[u, x]

Rule 2715

Int[((b_.)*sin[(c_.) + (d_.)*(x_)])^(n_), x_Symbol] :> Simp[(-b)*Cos[c + d*x]*((b*Sin[c + d*x])^(n - 1)/(d*n))
, x] + Dist[b^2*((n - 1)/n), Int[(b*Sin[c + d*x])^(n - 2), x], x] /; FreeQ[{b, c, d}, x] && GtQ[n, 1] && Integ
erQ[2*n]

Rule 3380

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

Rule 3383

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

Rule 3384

Int[sin[(e_.) + (f_.)*(x_)]/((c_.) + (d_.)*(x_)), x_Symbol] :> Dist[Cos[(d*e - c*f)/d], Int[Sin[c*(f/d) + f*x]
/(c + d*x), x], x] + Dist[Sin[(d*e - c*f)/d], Int[Cos[c*(f/d) + f*x]/(c + d*x), x], x] /; FreeQ[{c, d, e, f},
x] && NeQ[d*e - c*f, 0]

Rubi steps

\begin {align*} \int \log (x) \sin ^2(a+b x) \, dx &=\frac {1}{2} x \log (x)-\frac {\cos (a+b x) \log (x) \sin (a+b x)}{2 b}-\int \left (\frac {1}{2}-\frac {\sin (2 a+2 b x)}{4 b x}\right ) \, dx\\ &=-\frac {x}{2}+\frac {1}{2} x \log (x)-\frac {\cos (a+b x) \log (x) \sin (a+b x)}{2 b}+\frac {\int \frac {\sin (2 a+2 b x)}{x} \, dx}{4 b}\\ &=-\frac {x}{2}+\frac {1}{2} x \log (x)-\frac {\cos (a+b x) \log (x) \sin (a+b x)}{2 b}+\frac {\cos (2 a) \int \frac {\sin (2 b x)}{x} \, dx}{4 b}+\frac {\sin (2 a) \int \frac {\cos (2 b x)}{x} \, dx}{4 b}\\ &=-\frac {x}{2}+\frac {1}{2} x \log (x)+\frac {\text {Ci}(2 b x) \sin (2 a)}{4 b}-\frac {\cos (a+b x) \log (x) \sin (a+b x)}{2 b}+\frac {\cos (2 a) \text {Si}(2 b x)}{4 b}\\ \end {align*}

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Mathematica [A]
time = 0.06, size = 50, normalized size = 0.76 \begin {gather*} \frac {-2 b x+2 b x \log (x)+\text {Ci}(2 b x) \sin (2 a)-\log (x) \sin (2 (a+b x))+\cos (2 a) \text {Si}(2 b x)}{4 b} \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[Log[x]*Sin[a + b*x]^2,x]

[Out]

(-2*b*x + 2*b*x*Log[x] + CosIntegral[2*b*x]*Sin[2*a] - Log[x]*Sin[2*(a + b*x)] + Cos[2*a]*SinIntegral[2*b*x])/
(4*b)

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Maple [C] Result contains higher order function than in optimal. Order 9 vs. order 4.
time = 0.13, size = 132, normalized size = 2.00

method	result	size
risch	\(\frac {x \ln \left (x \right )}{2}-\frac {\ln \left (x \right ) \sin \left (2 b x +2 a \right )}{4 b}-\frac {{\mathrm e}^{-2 i a} \pi \,\mathrm {csgn}\left (b x \right )}{8 b}+\frac {{\mathrm e}^{-2 i a} \sinIntegral \left (2 b x \right )}{4 b}-\frac {i {\mathrm e}^{-2 i a} \expIntegral \left (1, -2 i b x \right )}{8 b}+\frac {a \ln \left (i b x \right )}{2 b}-\frac {x}{2}-\frac {a}{2 b}-\frac {a \ln \left (a +i \left (i b x +i a \right )\right )}{2 b}+\frac {i {\mathrm e}^{2 i a} \expIntegral \left (1, -2 i b x \right )}{8 b}\)	\(132\)

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(ln(x)*sin(b*x+a)^2,x,method=_RETURNVERBOSE)

[Out]

1/2*x*ln(x)-1/4*ln(x)/b*sin(2*b*x+2*a)-1/8/b*exp(-2*I*a)*Pi*csgn(b*x)+1/4/b*exp(-2*I*a)*Si(2*b*x)-1/8*I/b*exp(
-2*I*a)*Ei(1,-2*I*b*x)+1/2/b*a*ln(I*b*x)-1/2*x-1/2*a/b-1/2/b*a*ln(a+I*(I*b*x+I*a))+1/8*I/b*exp(2*I*a)*Ei(1,-2*
I*b*x)

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Maxima [C] Result contains complex when optimal does not.
time = 0.36, size = 79, normalized size = 1.20 \begin {gather*} \frac {{\left (2 \, b x + 2 \, a - \sin \left (2 \, b x + 2 \, a\right )\right )} \log \left (x\right )}{4 \, b} - \frac {4 \, b x + {\left (i \, {\rm Ei}\left (2 i \, b x\right ) - i \, {\rm Ei}\left (-2 i \, b x\right )\right )} \cos \left (2 \, a\right ) + 4 \, a \log \left (x\right ) - {\left ({\rm Ei}\left (2 i \, b x\right ) + {\rm Ei}\left (-2 i \, b x\right )\right )} \sin \left (2 \, a\right )}{8 \, b} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(log(x)*sin(b*x+a)^2,x, algorithm="maxima")

[Out]

1/4*(2*b*x + 2*a - sin(2*b*x + 2*a))*log(x)/b - 1/8*(4*b*x + (I*Ei(2*I*b*x) - I*Ei(-2*I*b*x))*cos(2*a) + 4*a*l
og(x) - (Ei(2*I*b*x) + Ei(-2*I*b*x))*sin(2*a))/b

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Fricas [A]
time = 0.43, size = 59, normalized size = 0.89 \begin {gather*} \frac {4 \, b x \log \left (x\right ) - 4 \, \cos \left (b x + a\right ) \log \left (x\right ) \sin \left (b x + a\right ) - 4 \, b x + {\left (\operatorname {Ci}\left (2 \, b x\right ) + \operatorname {Ci}\left (-2 \, b x\right )\right )} \sin \left (2 \, a\right ) + 2 \, \cos \left (2 \, a\right ) \operatorname {Si}\left (2 \, b x\right )}{8 \, b} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(log(x)*sin(b*x+a)^2,x, algorithm="fricas")

[Out]

1/8*(4*b*x*log(x) - 4*cos(b*x + a)*log(x)*sin(b*x + a) - 4*b*x + (cos_integral(2*b*x) + cos_integral(-2*b*x))*
sin(2*a) + 2*cos(2*a)*sin_integral(2*b*x))/b

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Sympy [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \log {\left (x \right )} \sin ^{2}{\left (a + b x \right )}\, dx \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(ln(x)*sin(b*x+a)**2,x)

[Out]

Integral(log(x)*sin(a + b*x)**2, x)

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Giac [C] Result contains higher order function than in optimal. Order 9 vs. order 4.
time = 4.58, size = 123, normalized size = 1.86 \begin {gather*} \frac {1}{4} \, {\left (2 \, x - \frac {\sin \left (2 \, b x + 2 \, a\right )}{b}\right )} \log \left (x\right ) - \frac {4 \, b x \tan \left (a\right )^{2} + \Im \left ( \operatorname {Ci}\left (2 \, b x\right ) \right ) \tan \left (a\right )^{2} - \Im \left ( \operatorname {Ci}\left (-2 \, b x\right ) \right ) \tan \left (a\right )^{2} + 2 \, \operatorname {Si}\left (2 \, b x\right ) \tan \left (a\right )^{2} + 4 \, b x - 2 \, \Re \left ( \operatorname {Ci}\left (2 \, b x\right ) \right ) \tan \left (a\right ) - 2 \, \Re \left ( \operatorname {Ci}\left (-2 \, b x\right ) \right ) \tan \left (a\right ) - \Im \left ( \operatorname {Ci}\left (2 \, b x\right ) \right ) + \Im \left ( \operatorname {Ci}\left (-2 \, b x\right ) \right ) - 2 \, \operatorname {Si}\left (2 \, b x\right )}{8 \, {\left (b \tan \left (a\right )^{2} + b\right )}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(log(x)*sin(b*x+a)^2,x, algorithm="giac")

[Out]

1/4*(2*x - sin(2*b*x + 2*a)/b)*log(x) - 1/8*(4*b*x*tan(a)^2 + imag_part(cos_integral(2*b*x))*tan(a)^2 - imag_p
art(cos_integral(-2*b*x))*tan(a)^2 + 2*sin_integral(2*b*x)*tan(a)^2 + 4*b*x - 2*real_part(cos_integral(2*b*x))
*tan(a) - 2*real_part(cos_integral(-2*b*x))*tan(a) - imag_part(cos_integral(2*b*x)) + imag_part(cos_integral(-
2*b*x)) - 2*sin_integral(2*b*x))/(b*tan(a)^2 + b)

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Mupad [F]
time = 0.00, size = -1, normalized size = -0.02 \begin {gather*} \int {\sin \left (a+b\,x\right )}^2\,\ln \left (x\right ) \,d x \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(sin(a + b*x)^2*log(x),x)

[Out]

int(sin(a + b*x)^2*log(x), x)

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