3.85 \(\int x^{2+m} \sin ^2(a+b x) \, dx\)

Optimal. Leaf size=103 \[ -\frac{i e^{2 i a} 2^{-m-5} x^m (-i b x)^{-m} \text{Gamma}(m+3,-2 i b x)}{b^3}+\frac{i e^{-2 i a} 2^{-m-5} x^m (i b x)^{-m} \text{Gamma}(m+3,2 i b x)}{b^3}+\frac{x^{m+3}}{2 (m+3)} \]

[Out]

x^(3 + m)/(2*(3 + m)) - (I*2^(-5 - m)*E^((2*I)*a)*x^m*Gamma[3 + m, (-2*I)*b*x])/(b^3*((-I)*b*x)^m) + (I*2^(-5
- m)*x^m*Gamma[3 + m, (2*I)*b*x])/(b^3*E^((2*I)*a)*(I*b*x)^m)

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Rubi [A]  time = 0.142807, antiderivative size = 103, normalized size of antiderivative = 1., number of steps used = 5, number of rules used = 3, integrand size = 14, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.214, Rules used = {3312, 3307, 2181} \[ -\frac{i e^{2 i a} 2^{-m-5} x^m (-i b x)^{-m} \text{Gamma}(m+3,-2 i b x)}{b^3}+\frac{i e^{-2 i a} 2^{-m-5} x^m (i b x)^{-m} \text{Gamma}(m+3,2 i b x)}{b^3}+\frac{x^{m+3}}{2 (m+3)} \]

Antiderivative was successfully verified.

[In]

Int[x^(2 + m)*Sin[a + b*x]^2,x]

[Out]

x^(3 + m)/(2*(3 + m)) - (I*2^(-5 - m)*E^((2*I)*a)*x^m*Gamma[3 + m, (-2*I)*b*x])/(b^3*((-I)*b*x)^m) + (I*2^(-5
- m)*x^m*Gamma[3 + m, (2*I)*b*x])/(b^3*E^((2*I)*a)*(I*b*x)^m)

Rule 3312

Int[((c_.) + (d_.)*(x_))^(m_)*sin[(e_.) + (f_.)*(x_)]^(n_), x_Symbol] :> Int[ExpandTrigReduce[(c + d*x)^m, Sin
[e + f*x]^n, x], x] /; FreeQ[{c, d, e, f, m}, x] && IGtQ[n, 1] && ( !RationalQ[m] || (GeQ[m, -1] && LtQ[m, 1])
)

Rule 3307

Int[((c_.) + (d_.)*(x_))^(m_.)*sin[(e_.) + Pi*(k_.) + (f_.)*(x_)], x_Symbol] :> Dist[I/2, Int[(c + d*x)^m/(E^(
I*k*Pi)*E^(I*(e + f*x))), x], x] - Dist[I/2, Int[(c + d*x)^m*E^(I*k*Pi)*E^(I*(e + f*x)), x], x] /; FreeQ[{c, d
, e, f, m}, x] && IntegerQ[2*k]

Rule 2181

Int[(F_)^((g_.)*((e_.) + (f_.)*(x_)))*((c_.) + (d_.)*(x_))^(m_), x_Symbol] :> -Simp[(F^(g*(e - (c*f)/d))*(c +
d*x)^FracPart[m]*Gamma[m + 1, (-((f*g*Log[F])/d))*(c + d*x)])/(d*(-((f*g*Log[F])/d))^(IntPart[m] + 1)*(-((f*g*
Log[F]*(c + d*x))/d))^FracPart[m]), x] /; FreeQ[{F, c, d, e, f, g, m}, x] &&  !IntegerQ[m]

Rubi steps

\begin{align*} \int x^{2+m} \sin ^2(a+b x) \, dx &=\int \left (\frac{x^{2+m}}{2}-\frac{1}{2} x^{2+m} \cos (2 a+2 b x)\right ) \, dx\\ &=\frac{x^{3+m}}{2 (3+m)}-\frac{1}{2} \int x^{2+m} \cos (2 a+2 b x) \, dx\\ &=\frac{x^{3+m}}{2 (3+m)}-\frac{1}{4} \int e^{-i (2 a+2 b x)} x^{2+m} \, dx-\frac{1}{4} \int e^{i (2 a+2 b x)} x^{2+m} \, dx\\ &=\frac{x^{3+m}}{2 (3+m)}-\frac{i 2^{-5-m} e^{2 i a} x^m (-i b x)^{-m} \Gamma (3+m,-2 i b x)}{b^3}+\frac{i 2^{-5-m} e^{-2 i a} x^m (i b x)^{-m} \Gamma (3+m,2 i b x)}{b^3}\\ \end{align*}

Mathematica [A]  time = 0.310719, size = 120, normalized size = 1.17 \[ \frac{2^{-m-5} x^m \left (b^2 x^2\right )^{-m} \left ((m+3) (\sin (2 a)+i \cos (2 a)) (-i b x)^m \text{Gamma}(m+3,2 i b x)+(m+3) (\sin (2 a)-i \cos (2 a)) (i b x)^m \text{Gamma}(m+3,-2 i b x)+b 2^{m+4} x \left (b^2 x^2\right )^{m+1}\right )}{b^3 (m+3)} \]

Antiderivative was successfully verified.

[In]

Integrate[x^(2 + m)*Sin[a + b*x]^2,x]

[Out]

(2^(-5 - m)*x^m*(2^(4 + m)*b*x*(b^2*x^2)^(1 + m) + (3 + m)*(I*b*x)^m*Gamma[3 + m, (-2*I)*b*x]*((-I)*Cos[2*a] +
Sin[2*a]) + (3 + m)*((-I)*b*x)^m*Gamma[3 + m, (2*I)*b*x]*(I*Cos[2*a] + Sin[2*a])))/(b^3*(3 + m)*(b^2*x^2)^m)

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Maple [F]  time = 0.069, size = 0, normalized size = 0. \begin{align*} \int{x}^{2+m} \left ( \sin \left ( bx+a \right ) \right ) ^{2}\, dx \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x^(2+m)*sin(b*x+a)^2,x)

[Out]

int(x^(2+m)*sin(b*x+a)^2,x)

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Maxima [F]  time = 0., size = 0, normalized size = 0. \begin{align*} -\frac{{\left (m + 3\right )} \int x^{2} x^{m} \cos \left (2 \, b x + 2 \, a\right )\,{d x} - e^{\left (m \log \left (x\right ) + 3 \, \log \left (x\right )\right )}}{2 \,{\left (m + 3\right )}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

-1/2*((m + 3)*integrate(x^2*x^m*cos(2*b*x + 2*a), x) - e^(m*log(x) + 3*log(x)))/(m + 3)

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Fricas [A]  time = 1.77347, size = 235, normalized size = 2.28 \begin{align*} \frac{4 \, b x x^{m + 2} +{\left (-i \, m - 3 i\right )} e^{\left (-{\left (m + 2\right )} \log \left (2 i \, b\right ) - 2 i \, a\right )} \Gamma \left (m + 3, 2 i \, b x\right ) +{\left (i \, m + 3 i\right )} e^{\left (-{\left (m + 2\right )} \log \left (-2 i \, b\right ) + 2 i \, a\right )} \Gamma \left (m + 3, -2 i \, b x\right )}{8 \,{\left (b m + 3 \, b\right )}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/8*(4*b*x*x^(m + 2) + (-I*m - 3*I)*e^(-(m + 2)*log(2*I*b) - 2*I*a)*gamma(m + 3, 2*I*b*x) + (I*m + 3*I)*e^(-(m
+ 2)*log(-2*I*b) + 2*I*a)*gamma(m + 3, -2*I*b*x))/(b*m + 3*b)

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Sympy [F(-1)]  time = 0., size = 0, normalized size = 0. \begin{align*} \text{Timed out} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x**(2+m)*sin(b*x+a)**2,x)

[Out]

Timed out

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Giac [F]  time = 0., size = 0, normalized size = 0. \begin{align*} \int x^{m + 2} \sin \left (b x + a\right )^{2}\,{d x} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

integrate(x^(m + 2)*sin(b*x + a)^2, x)