3.376 \(\int \frac{c-a^2 c x^2}{\sin ^{-1}(a x)^2} \, dx\)

Optimal. Leaf size=55 \[ -\frac{c \left (1-a^2 x^2\right )^{3/2}}{a \sin ^{-1}(a x)}-\frac{3 c \text{Si}\left (\sin ^{-1}(a x)\right )}{4 a}-\frac{3 c \text{Si}\left (3 \sin ^{-1}(a x)\right )}{4 a} \]

[Out]

-((c*(1 - a^2*x^2)^(3/2))/(a*ArcSin[a*x])) - (3*c*SinIntegral[ArcSin[a*x]])/(4*a) - (3*c*SinIntegral[3*ArcSin[
a*x]])/(4*a)

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Rubi [A]  time = 0.117651, antiderivative size = 55, normalized size of antiderivative = 1., number of steps used = 6, number of rules used = 4, integrand size = 18, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.222, Rules used = {4659, 4723, 4406, 3299} \[ -\frac{c \left (1-a^2 x^2\right )^{3/2}}{a \sin ^{-1}(a x)}-\frac{3 c \text{Si}\left (\sin ^{-1}(a x)\right )}{4 a}-\frac{3 c \text{Si}\left (3 \sin ^{-1}(a x)\right )}{4 a} \]

Antiderivative was successfully verified.

[In]

Int[(c - a^2*c*x^2)/ArcSin[a*x]^2,x]

[Out]

-((c*(1 - a^2*x^2)^(3/2))/(a*ArcSin[a*x])) - (3*c*SinIntegral[ArcSin[a*x]])/(4*a) - (3*c*SinIntegral[3*ArcSin[
a*x]])/(4*a)

Rule 4659

Int[((a_.) + ArcSin[(c_.)*(x_)]*(b_.))^(n_)*((d_) + (e_.)*(x_)^2)^(p_.), x_Symbol] :> Simp[(Sqrt[1 - c^2*x^2]*
(d + e*x^2)^p*(a + b*ArcSin[c*x])^(n + 1))/(b*c*(n + 1)), x] + Dist[(c*(2*p + 1)*d^IntPart[p]*(d + e*x^2)^Frac
Part[p])/(b*(n + 1)*(1 - c^2*x^2)^FracPart[p]), Int[x*(1 - c^2*x^2)^(p - 1/2)*(a + b*ArcSin[c*x])^(n + 1), x],
x] /; FreeQ[{a, b, c, d, e, p}, x] && EqQ[c^2*d + e, 0] && LtQ[n, -1]

Rule 4723

Int[((a_.) + ArcSin[(c_.)*(x_)]*(b_.))^(n_.)*(x_)^(m_.)*((d_) + (e_.)*(x_)^2)^(p_.), x_Symbol] :> Dist[d^p/c^(
m + 1), Subst[Int[(a + b*x)^n*Sin[x]^m*Cos[x]^(2*p + 1), x], x, ArcSin[c*x]], x] /; FreeQ[{a, b, c, d, e, n},
x] && EqQ[c^2*d + e, 0] && IntegerQ[2*p] && GtQ[p, -1] && IGtQ[m, 0] && (IntegerQ[p] || GtQ[d, 0])

Rule 4406

Int[Cos[(a_.) + (b_.)*(x_)]^(p_.)*((c_.) + (d_.)*(x_))^(m_.)*Sin[(a_.) + (b_.)*(x_)]^(n_.), x_Symbol] :> Int[E
xpandTrigReduce[(c + d*x)^m, Sin[a + b*x]^n*Cos[a + b*x]^p, x], x] /; FreeQ[{a, b, c, d, m}, x] && IGtQ[n, 0]
&& IGtQ[p, 0]

Rule 3299

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]

Rubi steps

\begin{align*} \int \frac{c-a^2 c x^2}{\sin ^{-1}(a x)^2} \, dx &=-\frac{c \left (1-a^2 x^2\right )^{3/2}}{a \sin ^{-1}(a x)}-(3 a c) \int \frac{x \sqrt{1-a^2 x^2}}{\sin ^{-1}(a x)} \, dx\\ &=-\frac{c \left (1-a^2 x^2\right )^{3/2}}{a \sin ^{-1}(a x)}-\frac{(3 c) \operatorname{Subst}\left (\int \frac{\cos ^2(x) \sin (x)}{x} \, dx,x,\sin ^{-1}(a x)\right )}{a}\\ &=-\frac{c \left (1-a^2 x^2\right )^{3/2}}{a \sin ^{-1}(a x)}-\frac{(3 c) \operatorname{Subst}\left (\int \left (\frac{\sin (x)}{4 x}+\frac{\sin (3 x)}{4 x}\right ) \, dx,x,\sin ^{-1}(a x)\right )}{a}\\ &=-\frac{c \left (1-a^2 x^2\right )^{3/2}}{a \sin ^{-1}(a x)}-\frac{(3 c) \operatorname{Subst}\left (\int \frac{\sin (x)}{x} \, dx,x,\sin ^{-1}(a x)\right )}{4 a}-\frac{(3 c) \operatorname{Subst}\left (\int \frac{\sin (3 x)}{x} \, dx,x,\sin ^{-1}(a x)\right )}{4 a}\\ &=-\frac{c \left (1-a^2 x^2\right )^{3/2}}{a \sin ^{-1}(a x)}-\frac{3 c \text{Si}\left (\sin ^{-1}(a x)\right )}{4 a}-\frac{3 c \text{Si}\left (3 \sin ^{-1}(a x)\right )}{4 a}\\ \end{align*}

Mathematica [A]  time = 0.222179, size = 55, normalized size = 1. \[ -\frac{c \left (4 \left (1-a^2 x^2\right )^{3/2}+3 \sin ^{-1}(a x) \text{Si}\left (\sin ^{-1}(a x)\right )+3 \sin ^{-1}(a x) \text{Si}\left (3 \sin ^{-1}(a x)\right )\right )}{4 a \sin ^{-1}(a x)} \]

Antiderivative was successfully verified.

[In]

Integrate[(c - a^2*c*x^2)/ArcSin[a*x]^2,x]

[Out]

-(c*(4*(1 - a^2*x^2)^(3/2) + 3*ArcSin[a*x]*SinIntegral[ArcSin[a*x]] + 3*ArcSin[a*x]*SinIntegral[3*ArcSin[a*x]]
))/(4*a*ArcSin[a*x])

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Maple [A]  time = 0.032, size = 59, normalized size = 1.1 \begin{align*} -{\frac{c}{4\,a\arcsin \left ( ax \right ) } \left ( 3\,{\it Si} \left ( \arcsin \left ( ax \right ) \right ) \arcsin \left ( ax \right ) +3\,{\it Si} \left ( 3\,\arcsin \left ( ax \right ) \right ) \arcsin \left ( ax \right ) +3\,\sqrt{-{a}^{2}{x}^{2}+1}+\cos \left ( 3\,\arcsin \left ( ax \right ) \right ) \right ) } \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((-a^2*c*x^2+c)/arcsin(a*x)^2,x)

[Out]

-1/4/a*c*(3*Si(arcsin(a*x))*arcsin(a*x)+3*Si(3*arcsin(a*x))*arcsin(a*x)+3*(-a^2*x^2+1)^(1/2)+cos(3*arcsin(a*x)
))/arcsin(a*x)

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Maxima [F]  time = 0., size = 0, normalized size = 0. \begin{align*} -\frac{3 \, a^{2} c \arctan \left (a x, \sqrt{a x + 1} \sqrt{-a x + 1}\right ) \int \frac{\sqrt{a x + 1} \sqrt{-a x + 1} x}{\arctan \left (a x, \sqrt{a x + 1} \sqrt{-a x + 1}\right )}\,{d x} -{\left (a^{2} c x^{2} - c\right )} \sqrt{a x + 1} \sqrt{-a x + 1}}{a \arctan \left (a x, \sqrt{a x + 1} \sqrt{-a x + 1}\right )} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((-a^2*c*x^2+c)/arcsin(a*x)^2,x, algorithm="maxima")

[Out]

-(3*a^2*c*arctan2(a*x, sqrt(a*x + 1)*sqrt(-a*x + 1))*integrate(sqrt(a*x + 1)*sqrt(-a*x + 1)*x/arctan2(a*x, sqr
t(a*x + 1)*sqrt(-a*x + 1)), x) - (a^2*c*x^2 - c)*sqrt(a*x + 1)*sqrt(-a*x + 1))/(a*arctan2(a*x, sqrt(a*x + 1)*s
qrt(-a*x + 1)))

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Fricas [F]  time = 0., size = 0, normalized size = 0. \begin{align*}{\rm integral}\left (-\frac{a^{2} c x^{2} - c}{\arcsin \left (a x\right )^{2}}, x\right ) \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((-a^2*c*x^2+c)/arcsin(a*x)^2,x, algorithm="fricas")

[Out]

integral(-(a^2*c*x^2 - c)/arcsin(a*x)^2, x)

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Sympy [F]  time = 0., size = 0, normalized size = 0. \begin{align*} - c \left (\int \frac{a^{2} x^{2}}{\operatorname{asin}^{2}{\left (a x \right )}}\, dx + \int - \frac{1}{\operatorname{asin}^{2}{\left (a x \right )}}\, dx\right ) \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((-a**2*c*x**2+c)/asin(a*x)**2,x)

[Out]

-c*(Integral(a**2*x**2/asin(a*x)**2, x) + Integral(-1/asin(a*x)**2, x))

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Giac [A]  time = 1.38418, size = 66, normalized size = 1.2 \begin{align*} -\frac{3 \, c \operatorname{Si}\left (3 \, \arcsin \left (a x\right )\right )}{4 \, a} - \frac{3 \, c \operatorname{Si}\left (\arcsin \left (a x\right )\right )}{4 \, a} - \frac{{\left (-a^{2} x^{2} + 1\right )}^{\frac{3}{2}} c}{a \arcsin \left (a x\right )} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((-a^2*c*x^2+c)/arcsin(a*x)^2,x, algorithm="giac")

[Out]

-3/4*c*sin_integral(3*arcsin(a*x))/a - 3/4*c*sin_integral(arcsin(a*x))/a - (-a^2*x^2 + 1)^(3/2)*c/(a*arcsin(a*
x))