3.173 \(\int \frac {\cos ^2(a+b x)}{\sqrt {\sin (2 a+2 b x)}} \, dx\)

Optimal. Leaf size=40 \[ \frac {\sqrt {\sin (2 a+2 b x)}}{2 b}+\frac {F\left (\left .a+b x-\frac {\pi }{4}\right |2\right )}{2 b} \]

[Out]

-1/2*(sin(a+1/4*Pi+b*x)^2)^(1/2)/sin(a+1/4*Pi+b*x)*EllipticF(cos(a+1/4*Pi+b*x),2^(1/2))/b+1/2*sin(2*b*x+2*a)^(
1/2)/b

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Rubi [A]  time = 0.04, antiderivative size = 40, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, integrand size = 22, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.091, Rules used = {4297, 2641} \[ \frac {\sqrt {\sin (2 a+2 b x)}}{2 b}+\frac {F\left (\left .a+b x-\frac {\pi }{4}\right |2\right )}{2 b} \]

Antiderivative was successfully verified.

[In]

Int[Cos[a + b*x]^2/Sqrt[Sin[2*a + 2*b*x]],x]

[Out]

EllipticF[a - Pi/4 + b*x, 2]/(2*b) + Sqrt[Sin[2*a + 2*b*x]]/(2*b)

Rule 2641

Int[1/Sqrt[sin[(c_.) + (d_.)*(x_)]], x_Symbol] :> Simp[(2*EllipticF[(1*(c - Pi/2 + d*x))/2, 2])/d, x] /; FreeQ
[{c, d}, x]

Rule 4297

Int[(cos[(a_.) + (b_.)*(x_)]*(e_.))^(m_)*((g_.)*sin[(c_.) + (d_.)*(x_)])^(p_), x_Symbol] :> Simp[(e^2*(e*Cos[a
+ b*x])^(m - 2)*(g*Sin[c + d*x])^(p + 1))/(2*b*g*(m + 2*p)), x] + Dist[(e^2*(m + p - 1))/(m + 2*p), Int[(e*Co
s[a + b*x])^(m - 2)*(g*Sin[c + d*x])^p, x], x] /; FreeQ[{a, b, c, d, e, g, p}, x] && EqQ[b*c - a*d, 0] && EqQ[
d/b, 2] &&  !IntegerQ[p] && GtQ[m, 1] && NeQ[m + 2*p, 0] && IntegersQ[2*m, 2*p]

Rubi steps

\begin {align*} \int \frac {\cos ^2(a+b x)}{\sqrt {\sin (2 a+2 b x)}} \, dx &=\frac {\sqrt {\sin (2 a+2 b x)}}{2 b}+\frac {1}{2} \int \frac {1}{\sqrt {\sin (2 a+2 b x)}} \, dx\\ &=\frac {F\left (\left .a-\frac {\pi }{4}+b x\right |2\right )}{2 b}+\frac {\sqrt {\sin (2 a+2 b x)}}{2 b}\\ \end {align*}

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Mathematica [A]  time = 0.89, size = 76, normalized size = 1.90 \[ \frac {2 \sqrt {\sin (2 (a+b x))}-\frac {\sqrt {2} (\sin (a+b x)+\cos (a+b x)) F\left (\sin ^{-1}(\cos (a+b x)-\sin (a+b x))|\frac {1}{2}\right )}{\sqrt {\sin (2 (a+b x))+1}}}{4 b} \]

Antiderivative was successfully verified.

[In]

Integrate[Cos[a + b*x]^2/Sqrt[Sin[2*a + 2*b*x]],x]

[Out]

(2*Sqrt[Sin[2*(a + b*x)]] - (Sqrt[2]*EllipticF[ArcSin[Cos[a + b*x] - Sin[a + b*x]], 1/2]*(Cos[a + b*x] + Sin[a
+ b*x]))/Sqrt[1 + Sin[2*(a + b*x)]])/(4*b)

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fricas [F]  time = 0.60, size = 0, normalized size = 0.00 \[ {\rm integral}\left (\frac {\cos \left (b x + a\right )^{2}}{\sqrt {\sin \left (2 \, b x + 2 \, a\right )}}, x\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(b*x+a)^2/sin(2*b*x+2*a)^(1/2),x, algorithm="fricas")

[Out]

integral(cos(b*x + a)^2/sqrt(sin(2*b*x + 2*a)), x)

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giac [F]  time = 0.00, size = 0, normalized size = 0.00 \[ \int \frac {\cos \left (b x + a\right )^{2}}{\sqrt {\sin \left (2 \, b x + 2 \, a\right )}}\,{d x} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(b*x+a)^2/sin(2*b*x+2*a)^(1/2),x, algorithm="giac")

[Out]

integrate(cos(b*x + a)^2/sqrt(sin(2*b*x + 2*a)), x)

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maple [B]  time = 15.39, size = 59624230, normalized size = 1490605.75 \[ \text {output too large to display} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(cos(b*x+a)^2/sin(2*b*x+2*a)^(1/2),x)

[Out]

result too large to display

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maxima [F]  time = 0.00, size = 0, normalized size = 0.00 \[ \int \frac {\cos \left (b x + a\right )^{2}}{\sqrt {\sin \left (2 \, b x + 2 \, a\right )}}\,{d x} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(b*x+a)^2/sin(2*b*x+2*a)^(1/2),x, algorithm="maxima")

[Out]

integrate(cos(b*x + a)^2/sqrt(sin(2*b*x + 2*a)), x)

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mupad [F]  time = 0.00, size = -1, normalized size = -0.02 \[ \int \frac {{\cos \left (a+b\,x\right )}^2}{\sqrt {\sin \left (2\,a+2\,b\,x\right )}} \,d x \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(cos(a + b*x)^2/sin(2*a + 2*b*x)^(1/2),x)

[Out]

int(cos(a + b*x)^2/sin(2*a + 2*b*x)^(1/2), x)

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sympy [F(-1)]  time = 0.00, size = 0, normalized size = 0.00 \[ \text {Timed out} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(b*x+a)**2/sin(2*b*x+2*a)**(1/2),x)

[Out]

Timed out

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