3.1.37 \(\int \sec ^n(a+b x) \, dx\) [37]

Optimal. Leaf size=70 \[ -\frac {\, _2F_1\left (\frac {1}{2},\frac {1-n}{2};\frac {3-n}{2};\cos ^2(a+b x)\right ) \sec ^{-1+n}(a+b x) \sin (a+b x)}{b (1-n) \sqrt {\sin ^2(a+b x)}} \]

[Out]

-hypergeom([1/2, 1/2-1/2*n],[3/2-1/2*n],cos(b*x+a)^2)*sec(b*x+a)^(-1+n)*sin(b*x+a)/b/(1-n)/(sin(b*x+a)^2)^(1/2
)

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Rubi [A]
time = 0.02, antiderivative size = 70, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, integrand size = 8, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.250, Rules used = {3857, 2722} \begin {gather*} -\frac {\sin (a+b x) \sec ^{n-1}(a+b x) \, _2F_1\left (\frac {1}{2},\frac {1-n}{2};\frac {3-n}{2};\cos ^2(a+b x)\right )}{b (1-n) \sqrt {\sin ^2(a+b x)}} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[Sec[a + b*x]^n,x]

[Out]

-((Hypergeometric2F1[1/2, (1 - n)/2, (3 - n)/2, Cos[a + b*x]^2]*Sec[a + b*x]^(-1 + n)*Sin[a + b*x])/(b*(1 - n)
*Sqrt[Sin[a + b*x]^2]))

Rule 2722

Int[((b_.)*sin[(c_.) + (d_.)*(x_)])^(n_), x_Symbol] :> Simp[Cos[c + d*x]*((b*Sin[c + d*x])^(n + 1)/(b*d*(n + 1
)*Sqrt[Cos[c + d*x]^2]))*Hypergeometric2F1[1/2, (n + 1)/2, (n + 3)/2, Sin[c + d*x]^2], x] /; FreeQ[{b, c, d, n
}, x] &&  !IntegerQ[2*n]

Rule 3857

Int[(csc[(c_.) + (d_.)*(x_)]*(b_.))^(n_), x_Symbol] :> Simp[(b*Csc[c + d*x])^(n - 1)*((Sin[c + d*x]/b)^(n - 1)
*Int[1/(Sin[c + d*x]/b)^n, x]), x] /; FreeQ[{b, c, d, n}, x] &&  !IntegerQ[n]

Rubi steps

\begin {align*} \int \sec ^n(a+b x) \, dx &=\cos ^n(a+b x) \sec ^n(a+b x) \int \cos ^{-n}(a+b x) \, dx\\ &=-\frac {\, _2F_1\left (\frac {1}{2},\frac {1-n}{2};\frac {3-n}{2};\cos ^2(a+b x)\right ) \sec ^{-1+n}(a+b x) \sin (a+b x)}{b (1-n) \sqrt {\sin ^2(a+b x)}}\\ \end {align*}

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Mathematica [A]
time = 0.06, size = 61, normalized size = 0.87 \begin {gather*} \frac {\csc (a+b x) \, _2F_1\left (\frac {1}{2},\frac {n}{2};\frac {2+n}{2};\sec ^2(a+b x)\right ) \sec ^{-1+n}(a+b x) \sqrt {-\tan ^2(a+b x)}}{b n} \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[Sec[a + b*x]^n,x]

[Out]

(Csc[a + b*x]*Hypergeometric2F1[1/2, n/2, (2 + n)/2, Sec[a + b*x]^2]*Sec[a + b*x]^(-1 + n)*Sqrt[-Tan[a + b*x]^
2])/(b*n)

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Maple [F]
time = 0.19, size = 0, normalized size = 0.00 \[\int \sec ^{n}\left (b x +a \right )\, dx\]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(sec(b*x+a)^n,x)

[Out]

int(sec(b*x+a)^n,x)

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Maxima [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {Failed to integrate} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(sec(b*x+a)^n,x, algorithm="maxima")

[Out]

integrate(sec(b*x + a)^n, x)

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Fricas [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {could not integrate} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(sec(b*x+a)^n,x, algorithm="fricas")

[Out]

integral(sec(b*x + a)^n, x)

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Sympy [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \sec ^{n}{\left (a + b x \right )}\, dx \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(sec(b*x+a)**n,x)

[Out]

Integral(sec(a + b*x)**n, x)

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Giac [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {could not integrate} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(sec(b*x+a)^n,x, algorithm="giac")

[Out]

integrate(sec(b*x + a)^n, x)

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Mupad [F]
time = 0.00, size = -1, normalized size = -0.01 \begin {gather*} \int {\left (\frac {1}{\cos \left (a+b\,x\right )}\right )}^n \,d x \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((1/cos(a + b*x))^n,x)

[Out]

int((1/cos(a + b*x))^n, x)

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