3.3.71 \(\int \frac {\sec ^2(x)}{a-a \sin ^2(x)} \, dx\) [271]

Optimal. Leaf size=18 \[ \frac {\tan (x)}{a}+\frac {\tan ^3(x)}{3 a} \]

[Out]

tan(x)/a+1/3*tan(x)^3/a

________________________________________________________________________________________

Rubi [A]
time = 0.03, antiderivative size = 18, normalized size of antiderivative = 1.00, 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 = {3254, 3852} \begin {gather*} \frac {\tan ^3(x)}{3 a}+\frac {\tan (x)}{a} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[Sec[x]^2/(a - a*Sin[x]^2),x]

[Out]

Tan[x]/a + Tan[x]^3/(3*a)

Rule 3254

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 3852

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

Rubi steps

\begin {align*} \int \frac {\sec ^2(x)}{a-a \sin ^2(x)} \, dx &=\frac {\int \sec ^4(x) \, dx}{a}\\ &=-\frac {\text {Subst}\left (\int \left (1+x^2\right ) \, dx,x,-\tan (x)\right )}{a}\\ &=\frac {\tan (x)}{a}+\frac {\tan ^3(x)}{3 a}\\ \end {align*}

________________________________________________________________________________________

Mathematica [A]
time = 0.00, size = 21, normalized size = 1.17 \begin {gather*} \frac {\frac {2 \tan (x)}{3}+\frac {1}{3} \sec ^2(x) \tan (x)}{a} \end {gather*}

Antiderivative was successfully verified.

[In]

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

[Out]

((2*Tan[x])/3 + (Sec[x]^2*Tan[x])/3)/a

________________________________________________________________________________________

Maple [A]
time = 0.16, size = 14, normalized size = 0.78

method	result	size
default	\(\frac {\frac {\left (\tan ^{3}\left (x \right )\right )}{3}+\tan \left (x \right )}{a}\)	\(14\)
risch	\(\frac {4 i \left (3 \,{\mathrm e}^{2 i x}+1\right )}{3 \left ({\mathrm e}^{2 i x}+1\right )^{3} a}\)	\(25\)
norman	\(\frac {-\frac {2 \tan \left (\frac {x}{2}\right )}{a}+\frac {4 \left (\tan ^{3}\left (\frac {x}{2}\right )\right )}{3 a}-\frac {2 \left (\tan ^{5}\left (\frac {x}{2}\right )\right )}{a}}{\left (\tan ^{2}\left (\frac {x}{2}\right )-1\right )^{3}}\)	\(44\)

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(sec(x)^2/(a-a*sin(x)^2),x,method=_RETURNVERBOSE)

[Out]

1/a*(1/3*tan(x)^3+tan(x))

________________________________________________________________________________________

Maxima [A]
time = 0.28, size = 14, normalized size = 0.78 \begin {gather*} \frac {\tan \left (x\right )^{3} + 3 \, \tan \left (x\right )}{3 \, a} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/3*(tan(x)^3 + 3*tan(x))/a

________________________________________________________________________________________

Fricas [A]
time = 0.37, size = 19, normalized size = 1.06 \begin {gather*} \frac {{\left (2 \, \cos \left (x\right )^{2} + 1\right )} \sin \left (x\right )}{3 \, a \cos \left (x\right )^{3}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

________________________________________________________________________________________

Sympy [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} - \frac {\int \frac {\sec ^{2}{\left (x \right )}}{\sin ^{2}{\left (x \right )} - 1}\, dx}{a} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(sec(x)**2/(a-a*sin(x)**2),x)

[Out]

-Integral(sec(x)**2/(sin(x)**2 - 1), x)/a

________________________________________________________________________________________

Giac [A]
time = 0.46, size = 14, normalized size = 0.78 \begin {gather*} \frac {\tan \left (x\right )^{3} + 3 \, \tan \left (x\right )}{3 \, a} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/3*(tan(x)^3 + 3*tan(x))/a

________________________________________________________________________________________

Mupad [B]
time = 13.87, size = 13, normalized size = 0.72 \begin {gather*} \frac {\mathrm {tan}\left (x\right )\,\left ({\mathrm {tan}\left (x\right )}^2+3\right )}{3\,a} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(1/(cos(x)^2*(a - a*sin(x)^2)),x)

[Out]

(tan(x)*(tan(x)^2 + 3))/(3*a)

________________________________________________________________________________________