Integrand size = 18, antiderivative size = 151 \[ \int \frac {\sqrt {a+a \cos (c+d x)}}{x^3} \, dx=-\frac {\sqrt {a+a \cos (c+d x)}}{2 x^2}-\frac {1}{8} d^2 \cos \left (\frac {c}{2}\right ) \sqrt {a+a \cos (c+d x)} \operatorname {CosIntegral}\left (\frac {d x}{2}\right ) \sec \left (\frac {c}{2}+\frac {d x}{2}\right )+\frac {1}{8} d^2 \sqrt {a+a \cos (c+d x)} \sec \left (\frac {c}{2}+\frac {d x}{2}\right ) \sin \left (\frac {c}{2}\right ) \text {Si}\left (\frac {d x}{2}\right )+\frac {d \sqrt {a+a \cos (c+d x)} \tan \left (\frac {c}{2}+\frac {d x}{2}\right )}{4 x} \] Output:
-1/2*(a+a*cos(d*x+c))^(1/2)/x^2-1/8*d^2*cos(1/2*c)*(a+a*cos(d*x+c))^(1/2)* Ci(1/2*d*x)*sec(1/2*d*x+1/2*c)+1/8*d^2*(a+a*cos(d*x+c))^(1/2)*sec(1/2*d*x+ 1/2*c)*sin(1/2*c)*Si(1/2*d*x)+1/4*d*(a+a*cos(d*x+c))^(1/2)*tan(1/2*d*x+1/2 *c)/x
Time = 0.36 (sec) , antiderivative size = 98, normalized size of antiderivative = 0.65 \[ \int \frac {\sqrt {a+a \cos (c+d x)}}{x^3} \, dx=\frac {\sqrt {a (1+\cos (c+d x))} \left (-4-d^2 x^2 \cos \left (\frac {c}{2}\right ) \operatorname {CosIntegral}\left (\frac {d x}{2}\right ) \sec \left (\frac {1}{2} (c+d x)\right )+d^2 x^2 \sec \left (\frac {1}{2} (c+d x)\right ) \sin \left (\frac {c}{2}\right ) \text {Si}\left (\frac {d x}{2}\right )+2 d x \tan \left (\frac {1}{2} (c+d x)\right )\right )}{8 x^2} \] Input:
Integrate[Sqrt[a + a*Cos[c + d*x]]/x^3,x]
Output:
(Sqrt[a*(1 + Cos[c + d*x])]*(-4 - d^2*x^2*Cos[c/2]*CosIntegral[(d*x)/2]*Se c[(c + d*x)/2] + d^2*x^2*Sec[(c + d*x)/2]*Sin[c/2]*SinIntegral[(d*x)/2] + 2*d*x*Tan[(c + d*x)/2]))/(8*x^2)
Time = 0.65 (sec) , antiderivative size = 108, normalized size of antiderivative = 0.72, number of steps used = 12, number of rules used = 12, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.667, Rules used = {3042, 3800, 3042, 3778, 25, 3042, 3778, 3042, 3784, 3042, 3780, 3783}
Below are the steps used by Rubi to obtain the solution. The rule number used for the transformation is given above next to the arrow. The rules definitions used are listed below.
\(\displaystyle \int \frac {\sqrt {a \cos (c+d x)+a}}{x^3} \, dx\) |
\(\Big \downarrow \) 3042 |
\(\displaystyle \int \frac {\sqrt {a \sin \left (c+d x+\frac {\pi }{2}\right )+a}}{x^3}dx\) |
\(\Big \downarrow \) 3800 |
\(\displaystyle \sec \left (\frac {c}{2}+\frac {d x}{2}\right ) \sqrt {a \cos (c+d x)+a} \int \frac {\cos \left (\frac {c}{2}+\frac {d x}{2}\right )}{x^3}dx\) |
\(\Big \downarrow \) 3042 |
\(\displaystyle \sec \left (\frac {c}{2}+\frac {d x}{2}\right ) \sqrt {a \cos (c+d x)+a} \int \frac {\sin \left (\frac {c}{2}+\frac {d x}{2}+\frac {\pi }{2}\right )}{x^3}dx\) |
\(\Big \downarrow \) 3778 |
\(\displaystyle \sec \left (\frac {c}{2}+\frac {d x}{2}\right ) \sqrt {a \cos (c+d x)+a} \left (\frac {1}{4} d \int -\frac {\sin \left (\frac {c}{2}+\frac {d x}{2}\right )}{x^2}dx-\frac {\cos \left (\frac {c}{2}+\frac {d x}{2}\right )}{2 x^2}\right )\) |
\(\Big \downarrow \) 25 |
\(\displaystyle \sec \left (\frac {c}{2}+\frac {d x}{2}\right ) \sqrt {a \cos (c+d x)+a} \left (-\frac {1}{4} d \int \frac {\sin \left (\frac {c}{2}+\frac {d x}{2}\right )}{x^2}dx-\frac {\cos \left (\frac {c}{2}+\frac {d x}{2}\right )}{2 x^2}\right )\) |
\(\Big \downarrow \) 3042 |
\(\displaystyle \sec \left (\frac {c}{2}+\frac {d x}{2}\right ) \sqrt {a \cos (c+d x)+a} \left (-\frac {1}{4} d \int \frac {\sin \left (\frac {c}{2}+\frac {d x}{2}\right )}{x^2}dx-\frac {\cos \left (\frac {c}{2}+\frac {d x}{2}\right )}{2 x^2}\right )\) |
\(\Big \downarrow \) 3778 |
\(\displaystyle \sec \left (\frac {c}{2}+\frac {d x}{2}\right ) \sqrt {a \cos (c+d x)+a} \left (-\frac {1}{4} d \left (\frac {1}{2} d \int \frac {\cos \left (\frac {c}{2}+\frac {d x}{2}\right )}{x}dx-\frac {\sin \left (\frac {c}{2}+\frac {d x}{2}\right )}{x}\right )-\frac {\cos \left (\frac {c}{2}+\frac {d x}{2}\right )}{2 x^2}\right )\) |
\(\Big \downarrow \) 3042 |
\(\displaystyle \sec \left (\frac {c}{2}+\frac {d x}{2}\right ) \sqrt {a \cos (c+d x)+a} \left (-\frac {1}{4} d \left (\frac {1}{2} d \int \frac {\sin \left (\frac {c}{2}+\frac {d x}{2}+\frac {\pi }{2}\right )}{x}dx-\frac {\sin \left (\frac {c}{2}+\frac {d x}{2}\right )}{x}\right )-\frac {\cos \left (\frac {c}{2}+\frac {d x}{2}\right )}{2 x^2}\right )\) |
\(\Big \downarrow \) 3784 |
\(\displaystyle \sec \left (\frac {c}{2}+\frac {d x}{2}\right ) \sqrt {a \cos (c+d x)+a} \left (-\frac {1}{4} d \left (\frac {1}{2} d \left (\cos \left (\frac {c}{2}\right ) \int \frac {\cos \left (\frac {d x}{2}\right )}{x}dx-\sin \left (\frac {c}{2}\right ) \int \frac {\sin \left (\frac {d x}{2}\right )}{x}dx\right )-\frac {\sin \left (\frac {c}{2}+\frac {d x}{2}\right )}{x}\right )-\frac {\cos \left (\frac {c}{2}+\frac {d x}{2}\right )}{2 x^2}\right )\) |
\(\Big \downarrow \) 3042 |
\(\displaystyle \sec \left (\frac {c}{2}+\frac {d x}{2}\right ) \sqrt {a \cos (c+d x)+a} \left (-\frac {1}{4} d \left (\frac {1}{2} d \left (\cos \left (\frac {c}{2}\right ) \int \frac {\sin \left (\frac {d x}{2}+\frac {\pi }{2}\right )}{x}dx-\sin \left (\frac {c}{2}\right ) \int \frac {\sin \left (\frac {d x}{2}\right )}{x}dx\right )-\frac {\sin \left (\frac {c}{2}+\frac {d x}{2}\right )}{x}\right )-\frac {\cos \left (\frac {c}{2}+\frac {d x}{2}\right )}{2 x^2}\right )\) |
\(\Big \downarrow \) 3780 |
\(\displaystyle \sec \left (\frac {c}{2}+\frac {d x}{2}\right ) \sqrt {a \cos (c+d x)+a} \left (-\frac {1}{4} d \left (\frac {1}{2} d \left (\cos \left (\frac {c}{2}\right ) \int \frac {\sin \left (\frac {d x}{2}+\frac {\pi }{2}\right )}{x}dx-\sin \left (\frac {c}{2}\right ) \text {Si}\left (\frac {d x}{2}\right )\right )-\frac {\sin \left (\frac {c}{2}+\frac {d x}{2}\right )}{x}\right )-\frac {\cos \left (\frac {c}{2}+\frac {d x}{2}\right )}{2 x^2}\right )\) |
\(\Big \downarrow \) 3783 |
\(\displaystyle \sec \left (\frac {c}{2}+\frac {d x}{2}\right ) \sqrt {a \cos (c+d x)+a} \left (-\frac {1}{4} d \left (\frac {1}{2} d \left (\cos \left (\frac {c}{2}\right ) \operatorname {CosIntegral}\left (\frac {d x}{2}\right )-\sin \left (\frac {c}{2}\right ) \text {Si}\left (\frac {d x}{2}\right )\right )-\frac {\sin \left (\frac {c}{2}+\frac {d x}{2}\right )}{x}\right )-\frac {\cos \left (\frac {c}{2}+\frac {d x}{2}\right )}{2 x^2}\right )\) |
Input:
Int[Sqrt[a + a*Cos[c + d*x]]/x^3,x]
Output:
Sqrt[a + a*Cos[c + d*x]]*Sec[c/2 + (d*x)/2]*(-1/2*Cos[c/2 + (d*x)/2]/x^2 - (d*(-(Sin[c/2 + (d*x)/2]/x) + (d*(Cos[c/2]*CosIntegral[(d*x)/2] - Sin[c/2 ]*SinIntegral[(d*x)/2]))/2))/4)
Int[((c_.) + (d_.)*(x_))^(m_)*sin[(e_.) + (f_.)*(x_)], x_Symbol] :> Simp[(c + d*x)^(m + 1)*(Sin[e + f*x]/(d*(m + 1))), x] - Simp[f/(d*(m + 1)) Int[( c + d*x)^(m + 1)*Cos[e + f*x], x], x] /; FreeQ[{c, d, e, f}, x] && LtQ[m, - 1]
Int[sin[(e_.) + (f_.)*(x_)]/((c_.) + (d_.)*(x_)), x_Symbol] :> Simp[SinInte gral[e + f*x]/d, x] /; FreeQ[{c, d, e, f}, x] && EqQ[d*e - c*f, 0]
Int[sin[(e_.) + (f_.)*(x_)]/((c_.) + (d_.)*(x_)), x_Symbol] :> Simp[CosInte gral[e - Pi/2 + f*x]/d, x] /; FreeQ[{c, d, e, f}, x] && EqQ[d*(e - Pi/2) - c*f, 0]
Int[sin[(e_.) + (f_.)*(x_)]/((c_.) + (d_.)*(x_)), x_Symbol] :> Simp[Cos[(d* e - c*f)/d] Int[Sin[c*(f/d) + f*x]/(c + d*x), x], x] + Simp[Sin[(d*e - c* f)/d] Int[Cos[c*(f/d) + f*x]/(c + d*x), x], x] /; FreeQ[{c, d, e, f}, x] && NeQ[d*e - c*f, 0]
Int[((c_.) + (d_.)*(x_))^(m_.)*((a_) + (b_.)*sin[(e_.) + (f_.)*(x_)])^(n_), x_Symbol] :> Simp[(2*a)^IntPart[n]*((a + b*Sin[e + f*x])^FracPart[n]/Sin[e /2 + a*(Pi/(4*b)) + f*(x/2)]^(2*FracPart[n])) Int[(c + d*x)^m*Sin[e/2 + a *(Pi/(4*b)) + f*(x/2)]^(2*n), x], x] /; FreeQ[{a, b, c, d, e, f, m}, x] && EqQ[a^2 - b^2, 0] && IntegerQ[n + 1/2] && (GtQ[n, 0] || IGtQ[m, 0])
\[\int \frac {\sqrt {a +a \cos \left (d x +c \right )}}{x^{3}}d x\]
Input:
int((a+a*cos(d*x+c))^(1/2)/x^3,x)
Output:
int((a+a*cos(d*x+c))^(1/2)/x^3,x)
Exception generated. \[ \int \frac {\sqrt {a+a \cos (c+d x)}}{x^3} \, dx=\text {Exception raised: TypeError} \] Input:
integrate((a+a*cos(d*x+c))^(1/2)/x^3,x, algorithm="fricas")
Output:
Exception raised: TypeError >> Error detected within library code: inte grate: implementation incomplete (has polynomial part)
\[ \int \frac {\sqrt {a+a \cos (c+d x)}}{x^3} \, dx=\int \frac {\sqrt {a \left (\cos {\left (c + d x \right )} + 1\right )}}{x^{3}}\, dx \] Input:
integrate((a+a*cos(d*x+c))**(1/2)/x**3,x)
Output:
Integral(sqrt(a*(cos(c + d*x) + 1))/x**3, x)
Result contains complex when optimal does not.
Time = 0.17 (sec) , antiderivative size = 227, normalized size of antiderivative = 1.50 \[ \int \frac {\sqrt {a+a \cos (c+d x)}}{x^3} \, dx=-\frac {{\left ({\left (E_{3}\left (\frac {1}{2} i \, d x\right ) + E_{3}\left (-\frac {1}{2} i \, d x\right )\right )} \cos \left (\frac {1}{2} \, c\right )^{3} + {\left (E_{3}\left (\frac {1}{2} i \, d x\right ) + E_{3}\left (-\frac {1}{2} i \, d x\right )\right )} \cos \left (\frac {1}{2} \, c\right ) \sin \left (\frac {1}{2} \, c\right )^{2} + {\left (-i \, E_{3}\left (\frac {1}{2} i \, d x\right ) + i \, E_{3}\left (-\frac {1}{2} i \, d x\right )\right )} \sin \left (\frac {1}{2} \, c\right )^{3} + {\left (E_{3}\left (\frac {1}{2} i \, d x\right ) + E_{3}\left (-\frac {1}{2} i \, d x\right )\right )} \cos \left (\frac {1}{2} \, c\right ) + {\left ({\left (-i \, E_{3}\left (\frac {1}{2} i \, d x\right ) + i \, E_{3}\left (-\frac {1}{2} i \, d x\right )\right )} \cos \left (\frac {1}{2} \, c\right )^{2} - i \, E_{3}\left (\frac {1}{2} i \, d x\right ) + i \, E_{3}\left (-\frac {1}{2} i \, d x\right )\right )} \sin \left (\frac {1}{2} \, c\right )\right )} \sqrt {a} d^{2}}{2 \, {\left ({\left (\sqrt {2} \cos \left (\frac {1}{2} \, c\right )^{2} + \sqrt {2} \sin \left (\frac {1}{2} \, c\right )^{2}\right )} {\left (d x + c\right )}^{2} - 2 \, {\left (\sqrt {2} \cos \left (\frac {1}{2} \, c\right )^{2} + \sqrt {2} \sin \left (\frac {1}{2} \, c\right )^{2}\right )} {\left (d x + c\right )} c + {\left (\sqrt {2} \cos \left (\frac {1}{2} \, c\right )^{2} + \sqrt {2} \sin \left (\frac {1}{2} \, c\right )^{2}\right )} c^{2}\right )}} \] Input:
integrate((a+a*cos(d*x+c))^(1/2)/x^3,x, algorithm="maxima")
Output:
-1/2*((exp_integral_e(3, 1/2*I*d*x) + exp_integral_e(3, -1/2*I*d*x))*cos(1 /2*c)^3 + (exp_integral_e(3, 1/2*I*d*x) + exp_integral_e(3, -1/2*I*d*x))*c os(1/2*c)*sin(1/2*c)^2 + (-I*exp_integral_e(3, 1/2*I*d*x) + I*exp_integral _e(3, -1/2*I*d*x))*sin(1/2*c)^3 + (exp_integral_e(3, 1/2*I*d*x) + exp_inte gral_e(3, -1/2*I*d*x))*cos(1/2*c) + ((-I*exp_integral_e(3, 1/2*I*d*x) + I* exp_integral_e(3, -1/2*I*d*x))*cos(1/2*c)^2 - I*exp_integral_e(3, 1/2*I*d* x) + I*exp_integral_e(3, -1/2*I*d*x))*sin(1/2*c))*sqrt(a)*d^2/((sqrt(2)*co s(1/2*c)^2 + sqrt(2)*sin(1/2*c)^2)*(d*x + c)^2 - 2*(sqrt(2)*cos(1/2*c)^2 + sqrt(2)*sin(1/2*c)^2)*(d*x + c)*c + (sqrt(2)*cos(1/2*c)^2 + sqrt(2)*sin(1 /2*c)^2)*c^2)
Result contains higher order function than in optimal. Order 9 vs. order 4.
Time = 0.38 (sec) , antiderivative size = 662, normalized size of antiderivative = 4.38 \[ \int \frac {\sqrt {a+a \cos (c+d x)}}{x^3} \, dx=\text {Too large to display} \] Input:
integrate((a+a*cos(d*x+c))^(1/2)/x^3,x, algorithm="giac")
Output:
1/16*sqrt(2)*(d^2*x^2*real_part(cos_integral(1/2*d*x))*sgn(cos(1/2*d*x + 1 /2*c))*tan(1/4*d*x)^2*tan(1/4*c)^2 + d^2*x^2*real_part(cos_integral(-1/2*d *x))*sgn(cos(1/2*d*x + 1/2*c))*tan(1/4*d*x)^2*tan(1/4*c)^2 + 2*d^2*x^2*ima g_part(cos_integral(1/2*d*x))*sgn(cos(1/2*d*x + 1/2*c))*tan(1/4*d*x)^2*tan (1/4*c) - 2*d^2*x^2*imag_part(cos_integral(-1/2*d*x))*sgn(cos(1/2*d*x + 1/ 2*c))*tan(1/4*d*x)^2*tan(1/4*c) + 4*d^2*x^2*sgn(cos(1/2*d*x + 1/2*c))*sin_ integral(1/2*d*x)*tan(1/4*d*x)^2*tan(1/4*c) - d^2*x^2*real_part(cos_integr al(1/2*d*x))*sgn(cos(1/2*d*x + 1/2*c))*tan(1/4*d*x)^2 - d^2*x^2*real_part( cos_integral(-1/2*d*x))*sgn(cos(1/2*d*x + 1/2*c))*tan(1/4*d*x)^2 + d^2*x^2 *real_part(cos_integral(1/2*d*x))*sgn(cos(1/2*d*x + 1/2*c))*tan(1/4*c)^2 + d^2*x^2*real_part(cos_integral(-1/2*d*x))*sgn(cos(1/2*d*x + 1/2*c))*tan(1 /4*c)^2 + 2*d^2*x^2*imag_part(cos_integral(1/2*d*x))*sgn(cos(1/2*d*x + 1/2 *c))*tan(1/4*c) - 2*d^2*x^2*imag_part(cos_integral(-1/2*d*x))*sgn(cos(1/2* d*x + 1/2*c))*tan(1/4*c) + 4*d^2*x^2*sgn(cos(1/2*d*x + 1/2*c))*sin_integra l(1/2*d*x)*tan(1/4*c) - d^2*x^2*real_part(cos_integral(1/2*d*x))*sgn(cos(1 /2*d*x + 1/2*c)) - d^2*x^2*real_part(cos_integral(-1/2*d*x))*sgn(cos(1/2*d *x + 1/2*c)) - 8*d*x*sgn(cos(1/2*d*x + 1/2*c))*tan(1/4*d*x)^2*tan(1/4*c) - 8*d*x*sgn(cos(1/2*d*x + 1/2*c))*tan(1/4*d*x)*tan(1/4*c)^2 - 8*sgn(cos(1/2 *d*x + 1/2*c))*tan(1/4*d*x)^2*tan(1/4*c)^2 + 8*d*x*sgn(cos(1/2*d*x + 1/2*c ))*tan(1/4*d*x) + 8*d*x*sgn(cos(1/2*d*x + 1/2*c))*tan(1/4*c) + 8*sgn(co...
Timed out. \[ \int \frac {\sqrt {a+a \cos (c+d x)}}{x^3} \, dx=\int \frac {\sqrt {a+a\,\cos \left (c+d\,x\right )}}{x^3} \,d x \] Input:
int((a + a*cos(c + d*x))^(1/2)/x^3,x)
Output:
int((a + a*cos(c + d*x))^(1/2)/x^3, x)
\[ \int \frac {\sqrt {a+a \cos (c+d x)}}{x^3} \, dx=\sqrt {a}\, \left (\int \frac {\sqrt {\cos \left (d x +c \right )+1}}{x^{3}}d x \right ) \] Input:
int((a+a*cos(d*x+c))^(1/2)/x^3,x)
Output:
sqrt(a)*int(sqrt(cos(c + d*x) + 1)/x**3,x)