\(\int \frac {x}{\sqrt {\arcsin (a x)}} \, dx\) [95]

Optimal result

Integrand size = 10, antiderivative size = 28 \[ \int \frac {x}{\sqrt {\arcsin (a x)}} \, dx=\frac {\sqrt {\pi } \operatorname {FresnelS}\left (\frac {2 \sqrt {\arcsin (a x)}}{\sqrt {\pi }}\right )}{2 a^2} \]

[Out]

1/2*FresnelS(2*arcsin(a*x)^(1/2)/Pi^(1/2))*Pi^(1/2)/a^2

Rubi [A] (verified)

Time = 0.03 (sec) , antiderivative size = 28, normalized size of antiderivative = 1.00, number of steps used = 5, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.500, Rules used = {4731, 4491, 12, 3386, 3432} \[ \int \frac {x}{\sqrt {\arcsin (a x)}} \, dx=\frac {\sqrt {\pi } \operatorname {FresnelS}\left (\frac {2 \sqrt {\arcsin (a x)}}{\sqrt {\pi }}\right )}{2 a^2} \]

[In]

Int[x/Sqrt[ArcSin[a*x]],x]

[Out]

(Sqrt[Pi]*FresnelS[(2*Sqrt[ArcSin[a*x]])/Sqrt[Pi]])/(2*a^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 3386

Int[sin[(e_.) + (f_.)*(x_)]/Sqrt[(c_.) + (d_.)*(x_)], x_Symbol] :> Dist[2/d, Subst[Int[Sin[f*(x^2/d)], x], x,
Sqrt[c + d*x]], x] /; FreeQ[{c, d, e, f}, x] && ComplexFreeQ[f] && EqQ[d*e - c*f, 0]

Rule 3432

Int[Sin[(d_.)*((e_.) + (f_.)*(x_))^2], x_Symbol] :> Simp[(Sqrt[Pi/2]/(f*Rt[d, 2]))*FresnelS[Sqrt[2/Pi]*Rt[d, 2
]*(e + f*x)], x] /; FreeQ[{d, e, f}, x]

Rule 4491

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 4731

Int[((a_.) + ArcSin[(c_.)*(x_)]*(b_.))^(n_)*(x_)^(m_.), x_Symbol] :> Dist[1/(b*c^(m + 1)), Subst[Int[x^n*Sin[-
a/b + x/b]^m*Cos[-a/b + x/b], x], x, a + b*ArcSin[c*x]], x] /; FreeQ[{a, b, c, n}, x] && IGtQ[m, 0]

Rubi steps \begin{align*} \text {integral}& = \frac {\text {Subst}\left (\int \frac {\cos (x) \sin (x)}{\sqrt {x}} \, dx,x,\arcsin (a x)\right )}{a^2} \\ & = \frac {\text {Subst}\left (\int \frac {\sin (2 x)}{2 \sqrt {x}} \, dx,x,\arcsin (a x)\right )}{a^2} \\ & = \frac {\text {Subst}\left (\int \frac {\sin (2 x)}{\sqrt {x}} \, dx,x,\arcsin (a x)\right )}{2 a^2} \\ & = \frac {\text {Subst}\left (\int \sin \left (2 x^2\right ) \, dx,x,\sqrt {\arcsin (a x)}\right )}{a^2} \\ & = \frac {\sqrt {\pi } \operatorname {FresnelS}\left (\frac {2 \sqrt {\arcsin (a x)}}{\sqrt {\pi }}\right )}{2 a^2} \\ \end{align*}

Mathematica [C] (verified)

Result contains complex when optimal does not.

Time = 0.01 (sec) , antiderivative size = 71, normalized size of antiderivative = 2.54 \[ \int \frac {x}{\sqrt {\arcsin (a x)}} \, dx=-\frac {\sqrt {-i \arcsin (a x)} \Gamma \left (\frac {1}{2},-2 i \arcsin (a x)\right )+\sqrt {i \arcsin (a x)} \Gamma \left (\frac {1}{2},2 i \arcsin (a x)\right )}{4 \sqrt {2} a^2 \sqrt {\arcsin (a x)}} \]

[In]

Integrate[x/Sqrt[ArcSin[a*x]],x]

[Out]

-1/4*(Sqrt[(-I)*ArcSin[a*x]]*Gamma[1/2, (-2*I)*ArcSin[a*x]] + Sqrt[I*ArcSin[a*x]]*Gamma[1/2, (2*I)*ArcSin[a*x]
])/(Sqrt[2]*a^2*Sqrt[ArcSin[a*x]])

Maple [A] (verified)

Time = 0.03 (sec) , antiderivative size = 21, normalized size of antiderivative = 0.75

method	result	size
default	\(\frac {\operatorname {FresnelS}\left (\frac {2 \sqrt {\arcsin \left (a x \right )}}{\sqrt {\pi }}\right ) \sqrt {\pi }}{2 a^{2}}\)	\(21\)

[In]

int(x/arcsin(a*x)^(1/2),x,method=_RETURNVERBOSE)

[Out]

1/2*FresnelS(2*arcsin(a*x)^(1/2)/Pi^(1/2))*Pi^(1/2)/a^2

Fricas [F(-2)]

Exception generated. \[ \int \frac {x}{\sqrt {\arcsin (a x)}} \, dx=\text {Exception raised: TypeError} \]

[In]

integrate(x/arcsin(a*x)^(1/2),x, algorithm="fricas")

[Out]

Exception raised: TypeError >>  Error detected within library code:   integrate: implementation incomplete (co
nstant residues)

Sympy [F]

\[ \int \frac {x}{\sqrt {\arcsin (a x)}} \, dx=\int \frac {x}{\sqrt {\operatorname {asin}{\left (a x \right )}}}\, dx \]

[In]

integrate(x/asin(a*x)**(1/2),x)

[Out]

Integral(x/sqrt(asin(a*x)), x)

Maxima [F(-2)]

Exception generated. \[ \int \frac {x}{\sqrt {\arcsin (a x)}} \, dx=\text {Exception raised: RuntimeError} \]

[In]

integrate(x/arcsin(a*x)^(1/2),x, algorithm="maxima")

[Out]

Exception raised: RuntimeError >> ECL says: expt: undefined: 0 to a negative exponent.

Giac [C] (verification not implemented)

Result contains complex when optimal does not.

Time = 0.30 (sec) , antiderivative size = 35, normalized size of antiderivative = 1.25 \[ \int \frac {x}{\sqrt {\arcsin (a x)}} \, dx=\frac {\left (i - 1\right ) \, \sqrt {\pi } \operatorname {erf}\left (\left (i - 1\right ) \, \sqrt {\arcsin \left (a x\right )}\right )}{8 \, a^{2}} - \frac {\left (i + 1\right ) \, \sqrt {\pi } \operatorname {erf}\left (-\left (i + 1\right ) \, \sqrt {\arcsin \left (a x\right )}\right )}{8 \, a^{2}} \]

[In]

integrate(x/arcsin(a*x)^(1/2),x, algorithm="giac")

[Out]

(1/8*I - 1/8)*sqrt(pi)*erf((I - 1)*sqrt(arcsin(a*x)))/a^2 - (1/8*I + 1/8)*sqrt(pi)*erf(-(I + 1)*sqrt(arcsin(a*
x)))/a^2

Mupad [F(-1)]

Timed out. \[ \int \frac {x}{\sqrt {\arcsin (a x)}} \, dx=\int \frac {x}{\sqrt {\mathrm {asin}\left (a\,x\right )}} \,d x \]

[In]

int(x/asin(a*x)^(1/2),x)

[Out]

int(x/asin(a*x)^(1/2), x)