3.1.50 \(\int \sqrt {a \csc ^2(x)} \, dx\) [50]

Optimal. Leaf size=26 \[ -\sqrt {a} \tanh ^{-1}\left (\frac {\sqrt {a} \cot (x)}{\sqrt {a \csc ^2(x)}}\right ) \]

[Out]

-arctanh(cot(x)*a^(1/2)/(a*csc(x)^2)^(1/2))*a^(1/2)

________________________________________________________________________________________

Rubi [A]
time = 0.01, antiderivative size = 26, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, integrand size = 10, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.300, Rules used = {4207, 223, 212} \begin {gather*} -\sqrt {a} \tanh ^{-1}\left (\frac {\sqrt {a} \cot (x)}{\sqrt {a \csc ^2(x)}}\right ) \end {gather*}

Antiderivative was successfully verified.

[In]

Int[Sqrt[a*Csc[x]^2],x]

[Out]

-(Sqrt[a]*ArcTanh[(Sqrt[a]*Cot[x])/Sqrt[a*Csc[x]^2]])

Rule 212

Int[((a_) + (b_.)*(x_)^2)^(-1), x_Symbol] :> Simp[(1/(Rt[a, 2]*Rt[-b, 2]))*ArcTanh[Rt[-b, 2]*(x/Rt[a, 2])], x]
/; FreeQ[{a, b}, x] && NegQ[a/b] && (GtQ[a, 0] || LtQ[b, 0])

Rule 223

Int[1/Sqrt[(a_) + (b_.)*(x_)^2], x_Symbol] :> Subst[Int[1/(1 - b*x^2), x], x, x/Sqrt[a + b*x^2]] /; FreeQ[{a,
b}, x] &&  !GtQ[a, 0]

Rule 4207

Int[((b_.)*sec[(e_.) + (f_.)*(x_)]^2)^(p_), x_Symbol] :> With[{ff = FreeFactors[Tan[e + f*x], x]}, Dist[b*(ff/
f), Subst[Int[(b + b*ff^2*x^2)^(p - 1), x], x, Tan[e + f*x]/ff], x]] /; FreeQ[{b, e, f, p}, x] &&  !IntegerQ[p
]

Rubi steps

\begin {align*} \int \sqrt {a \csc ^2(x)} \, dx &=-\left (a \text {Subst}\left (\int \frac {1}{\sqrt {a+a x^2}} \, dx,x,\cot (x)\right )\right )\\ &=-\left (a \text {Subst}\left (\int \frac {1}{1-a x^2} \, dx,x,\frac {\cot (x)}{\sqrt {a \csc ^2(x)}}\right )\right )\\ &=-\sqrt {a} \tanh ^{-1}\left (\frac {\sqrt {a} \cot (x)}{\sqrt {a \csc ^2(x)}}\right )\\ \end {align*}

________________________________________________________________________________________

Mathematica [A]
time = 0.02, size = 30, normalized size = 1.15 \begin {gather*} \sqrt {a \csc ^2(x)} \left (-\log \left (\cos \left (\frac {x}{2}\right )\right )+\log \left (\sin \left (\frac {x}{2}\right )\right )\right ) \sin (x) \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[Sqrt[a*Csc[x]^2],x]

[Out]

Sqrt[a*Csc[x]^2]*(-Log[Cos[x/2]] + Log[Sin[x/2]])*Sin[x]

________________________________________________________________________________________

Maple [A]
time = 0.09, size = 32, normalized size = 1.23

method	result	size
default	\(\frac {\sin \left (x \right ) \ln \left (-\frac {\cos \left (x \right )-1}{\sin \left (x \right )}\right ) \sqrt {-\frac {a}{\cos ^{2}\left (x \right )-1}}\, \sqrt {4}}{2}\)	\(32\)
risch	\(-2 \sqrt {-\frac {a \,{\mathrm e}^{2 i x}}{\left ({\mathrm e}^{2 i x}-1\right )^{2}}}\, \ln \left ({\mathrm e}^{i x}+1\right ) \sin \left (x \right )+2 \sqrt {-\frac {a \,{\mathrm e}^{2 i x}}{\left ({\mathrm e}^{2 i x}-1\right )^{2}}}\, \ln \left ({\mathrm e}^{i x}-1\right ) \sin \left (x \right )\)	\(64\)

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/2*sin(x)*ln(-(cos(x)-1)/sin(x))*(-1/(cos(x)^2-1)*a)^(1/2)*4^(1/2)

________________________________________________________________________________________

Maxima [A]
time = 0.56, size = 24, normalized size = 0.92 \begin {gather*} -\sqrt {-a} {\left (\arctan \left (\sin \left (x\right ), \cos \left (x\right ) + 1\right ) - \arctan \left (\sin \left (x\right ), \cos \left (x\right ) - 1\right )\right )} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

-sqrt(-a)*(arctan2(sin(x), cos(x) + 1) - arctan2(sin(x), cos(x) - 1))

________________________________________________________________________________________

Fricas [A]
time = 2.57, size = 64, normalized size = 2.46 \begin {gather*} \left [\frac {1}{2} \, \sqrt {-\frac {a}{\cos \left (x\right )^{2} - 1}} \log \left (-\frac {\cos \left (x\right ) - 1}{\cos \left (x\right ) + 1}\right ) \sin \left (x\right ), \sqrt {-a} \arctan \left (\frac {\sqrt {-a} \sqrt {-\frac {a}{\cos \left (x\right )^{2} - 1}} \cos \left (x\right ) \sin \left (x\right )}{a}\right )\right ] \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

[1/2*sqrt(-a/(cos(x)^2 - 1))*log(-(cos(x) - 1)/(cos(x) + 1))*sin(x), sqrt(-a)*arctan(sqrt(-a)*sqrt(-a/(cos(x)^
2 - 1))*cos(x)*sin(x)/a)]

________________________________________________________________________________________

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

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

Integral(sqrt(a*csc(x)**2), x)

________________________________________________________________________________________

Giac [A]
time = 0.41, size = 13, normalized size = 0.50 \begin {gather*} \sqrt {a} \log \left ({\left | \tan \left (\frac {1}{2} \, x\right ) \right |}\right ) \mathrm {sgn}\left (\sin \left (x\right )\right ) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

sqrt(a)*log(abs(tan(1/2*x)))*sgn(sin(x))

________________________________________________________________________________________

Mupad [F]
time = 0.00, size = -1, normalized size = -0.04 \begin {gather*} \int \sqrt {\frac {a}{{\sin \left (x\right )}^2}} \,d x \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((a/sin(x)^2)^(1/2),x)

[Out]

int((a/sin(x)^2)^(1/2), x)

________________________________________________________________________________________