3.274 \(\int \frac{\cos ^7(x)}{(a-a \sin ^2(x))^2} \, dx\)

Optimal. Leaf size=18 \[ \frac{\sin (x)}{a^2}-\frac{\sin ^3(x)}{3 a^2} \]

[Out]

Sin[x]/a^2 - Sin[x]^3/(3*a^2)

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Rubi [A]  time = 0.044215, antiderivative size = 18, normalized size of antiderivative = 1., number of steps used = 3, number of rules used = 2, integrand size = 16, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.125, Rules used = {3175, 2633} \[ \frac{\sin (x)}{a^2}-\frac{\sin ^3(x)}{3 a^2} \]

Antiderivative was successfully verified.

[In]

Int[Cos[x]^7/(a - a*Sin[x]^2)^2,x]

[Out]

Sin[x]/a^2 - Sin[x]^3/(3*a^2)

Rule 3175

Int[(u_.)*((a_) + (b_.)*sin[(e_.) + (f_.)*(x_)]^2)^(p_), x_Symbol] :> Dist[a^p, Int[ActivateTrig[u*cos[e + f*x
]^(2*p)], x], x] /; FreeQ[{a, b, e, f, p}, x] && EqQ[a + b, 0] && IntegerQ[p]

Rule 2633

Int[sin[(c_.) + (d_.)*(x_)]^(n_), x_Symbol] :> -Dist[d^(-1), Subst[Int[Expand[(1 - x^2)^((n - 1)/2), x], x], x
, Cos[c + d*x]], x] /; FreeQ[{c, d}, x] && IGtQ[(n - 1)/2, 0]

Rubi steps

\begin{align*} \int \frac{\cos ^7(x)}{\left (a-a \sin ^2(x)\right )^2} \, dx &=\frac{\int \cos ^3(x) \, dx}{a^2}\\ &=-\frac{\operatorname{Subst}\left (\int \left (1-x^2\right ) \, dx,x,-\sin (x)\right )}{a^2}\\ &=\frac{\sin (x)}{a^2}-\frac{\sin ^3(x)}{3 a^2}\\ \end{align*}

Mathematica [A]  time = 0.0027456, size = 19, normalized size = 1.06 \[ \frac{\frac{3 \sin (x)}{4}+\frac{1}{12} \sin (3 x)}{a^2} \]

Antiderivative was successfully verified.

[In]

Integrate[Cos[x]^7/(a - a*Sin[x]^2)^2,x]

[Out]

((3*Sin[x])/4 + Sin[3*x]/12)/a^2

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Maple [A]  time = 0.033, size = 14, normalized size = 0.8 \begin{align*}{\frac{1}{{a}^{2}} \left ( -{\frac{ \left ( \sin \left ( x \right ) \right ) ^{3}}{3}}+\sin \left ( x \right ) \right ) } \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(cos(x)^7/(a-a*sin(x)^2)^2,x)

[Out]

1/a^2*(-1/3*sin(x)^3+sin(x))

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Maxima [A]  time = 0.985575, size = 19, normalized size = 1.06 \begin{align*} -\frac{\sin \left (x\right )^{3} - 3 \, \sin \left (x\right )}{3 \, a^{2}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(x)^7/(a-a*sin(x)^2)^2,x, algorithm="maxima")

[Out]

-1/3*(sin(x)^3 - 3*sin(x))/a^2

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Fricas [A]  time = 1.82188, size = 42, normalized size = 2.33 \begin{align*} \frac{{\left (\cos \left (x\right )^{2} + 2\right )} \sin \left (x\right )}{3 \, a^{2}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(x)^7/(a-a*sin(x)^2)^2,x, algorithm="fricas")

[Out]

1/3*(cos(x)^2 + 2)*sin(x)/a^2

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Sympy [B]  time = 74.1649, size = 144, normalized size = 8. \begin{align*} \frac{6 \tan ^{5}{\left (\frac{x}{2} \right )}}{3 a^{2} \tan ^{6}{\left (\frac{x}{2} \right )} + 9 a^{2} \tan ^{4}{\left (\frac{x}{2} \right )} + 9 a^{2} \tan ^{2}{\left (\frac{x}{2} \right )} + 3 a^{2}} + \frac{4 \tan ^{3}{\left (\frac{x}{2} \right )}}{3 a^{2} \tan ^{6}{\left (\frac{x}{2} \right )} + 9 a^{2} \tan ^{4}{\left (\frac{x}{2} \right )} + 9 a^{2} \tan ^{2}{\left (\frac{x}{2} \right )} + 3 a^{2}} + \frac{6 \tan{\left (\frac{x}{2} \right )}}{3 a^{2} \tan ^{6}{\left (\frac{x}{2} \right )} + 9 a^{2} \tan ^{4}{\left (\frac{x}{2} \right )} + 9 a^{2} \tan ^{2}{\left (\frac{x}{2} \right )} + 3 a^{2}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(x)**7/(a-a*sin(x)**2)**2,x)

[Out]

6*tan(x/2)**5/(3*a**2*tan(x/2)**6 + 9*a**2*tan(x/2)**4 + 9*a**2*tan(x/2)**2 + 3*a**2) + 4*tan(x/2)**3/(3*a**2*
tan(x/2)**6 + 9*a**2*tan(x/2)**4 + 9*a**2*tan(x/2)**2 + 3*a**2) + 6*tan(x/2)/(3*a**2*tan(x/2)**6 + 9*a**2*tan(
x/2)**4 + 9*a**2*tan(x/2)**2 + 3*a**2)

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Giac [A]  time = 1.09902, size = 19, normalized size = 1.06 \begin{align*} -\frac{\sin \left (x\right )^{3} - 3 \, \sin \left (x\right )}{3 \, a^{2}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(x)^7/(a-a*sin(x)^2)^2,x, algorithm="giac")

[Out]

-1/3*(sin(x)^3 - 3*sin(x))/a^2