Integrand size = 25, antiderivative size = 103 \[ \int \sqrt {d \sec (e+f x)} (a+b \tan (e+f x))^2 \, dx=\frac {10 a b \sqrt {d \sec (e+f x)}}{3 f}+\frac {2 \left (3 a^2-2 b^2\right ) \sqrt {\cos (e+f x)} \operatorname {EllipticF}\left (\frac {1}{2} (e+f x),2\right ) \sqrt {d \sec (e+f x)}}{3 f}+\frac {2 b \sqrt {d \sec (e+f x)} (a+b \tan (e+f x))}{3 f} \]
10/3*a*b*(d*sec(f*x+e))^(1/2)/f+2/3*(3*a^2-2*b^2)*(cos(1/2*f*x+1/2*e)^2)^( 1/2)/cos(1/2*f*x+1/2*e)*EllipticF(sin(1/2*f*x+1/2*e),2^(1/2))*cos(f*x+e)^( 1/2)*(d*sec(f*x+e))^(1/2)/f+2/3*b*(d*sec(f*x+e))^(1/2)*(a+b*tan(f*x+e))/f
Time = 1.65 (sec) , antiderivative size = 87, normalized size of antiderivative = 0.84 \[ \int \sqrt {d \sec (e+f x)} (a+b \tan (e+f x))^2 \, dx=\frac {2 \sec ^2(e+f x) \sqrt {d \sec (e+f x)} \left (\left (3 a^2-2 b^2\right ) \cos ^{\frac {5}{2}}(e+f x) \operatorname {EllipticF}\left (\frac {1}{2} (e+f x),2\right )+b \cos (e+f x) (6 a \cos (e+f x)+b \sin (e+f x))\right )}{3 f} \]
(2*Sec[e + f*x]^2*Sqrt[d*Sec[e + f*x]]*((3*a^2 - 2*b^2)*Cos[e + f*x]^(5/2) *EllipticF[(e + f*x)/2, 2] + b*Cos[e + f*x]*(6*a*Cos[e + f*x] + b*Sin[e + f*x])))/(3*f)
Time = 0.53 (sec) , antiderivative size = 104, normalized size of antiderivative = 1.01, number of steps used = 9, number of rules used = 9, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.360, Rules used = {3042, 3993, 27, 3042, 3967, 3042, 4258, 3042, 3120}
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.
| \(\displaystyle \int \sqrt {d \sec (e+f x)} (a+b \tan (e+f x))^2 \, dx\) |
| \(\Big \downarrow \) 3042 |
| \(\displaystyle \int \sqrt {d \sec (e+f x)} (a+b \tan (e+f x))^2dx\) |
| \(\Big \downarrow \) 3993 |
| \(\displaystyle \frac {2}{3} \int \frac {1}{2} \sqrt {d \sec (e+f x)} \left (3 a^2+5 b \tan (e+f x) a-2 b^2\right )dx+\frac {2 b \sqrt {d \sec (e+f x)} (a+b \tan (e+f x))}{3 f}\) |
| \(\Big \downarrow \) 27 |
| \(\displaystyle \frac {1}{3} \int \sqrt {d \sec (e+f x)} \left (3 a^2+5 b \tan (e+f x) a-2 b^2\right )dx+\frac {2 b \sqrt {d \sec (e+f x)} (a+b \tan (e+f x))}{3 f}\) |
| \(\Big \downarrow \) 3042 |
| \(\displaystyle \frac {1}{3} \int \sqrt {d \sec (e+f x)} \left (3 a^2+5 b \tan (e+f x) a-2 b^2\right )dx+\frac {2 b \sqrt {d \sec (e+f x)} (a+b \tan (e+f x))}{3 f}\) |
| \(\Big \downarrow \) 3967 |
| \(\displaystyle \frac {1}{3} \left (\left (3 a^2-2 b^2\right ) \int \sqrt {d \sec (e+f x)}dx+\frac {10 a b \sqrt {d \sec (e+f x)}}{f}\right )+\frac {2 b \sqrt {d \sec (e+f x)} (a+b \tan (e+f x))}{3 f}\) |
| \(\Big \downarrow \) 3042 |
| \(\displaystyle \frac {1}{3} \left (\left (3 a^2-2 b^2\right ) \int \sqrt {d \csc \left (e+f x+\frac {\pi }{2}\right )}dx+\frac {10 a b \sqrt {d \sec (e+f x)}}{f}\right )+\frac {2 b \sqrt {d \sec (e+f x)} (a+b \tan (e+f x))}{3 f}\) |
| \(\Big \downarrow \) 4258 |
| \(\displaystyle \frac {1}{3} \left (\left (3 a^2-2 b^2\right ) \sqrt {\cos (e+f x)} \sqrt {d \sec (e+f x)} \int \frac {1}{\sqrt {\cos (e+f x)}}dx+\frac {10 a b \sqrt {d \sec (e+f x)}}{f}\right )+\frac {2 b \sqrt {d \sec (e+f x)} (a+b \tan (e+f x))}{3 f}\) |
| \(\Big \downarrow \) 3042 |
| \(\displaystyle \frac {1}{3} \left (\left (3 a^2-2 b^2\right ) \sqrt {\cos (e+f x)} \sqrt {d \sec (e+f x)} \int \frac {1}{\sqrt {\sin \left (e+f x+\frac {\pi }{2}\right )}}dx+\frac {10 a b \sqrt {d \sec (e+f x)}}{f}\right )+\frac {2 b \sqrt {d \sec (e+f x)} (a+b \tan (e+f x))}{3 f}\) |
| \(\Big \downarrow \) 3120 |
| \(\displaystyle \frac {1}{3} \left (\frac {2 \left (3 a^2-2 b^2\right ) \sqrt {\cos (e+f x)} \operatorname {EllipticF}\left (\frac {1}{2} (e+f x),2\right ) \sqrt {d \sec (e+f x)}}{f}+\frac {10 a b \sqrt {d \sec (e+f x)}}{f}\right )+\frac {2 b \sqrt {d \sec (e+f x)} (a+b \tan (e+f x))}{3 f}\) |
((10*a*b*Sqrt[d*Sec[e + f*x]])/f + (2*(3*a^2 - 2*b^2)*Sqrt[Cos[e + f*x]]*E llipticF[(e + f*x)/2, 2]*Sqrt[d*Sec[e + f*x]])/f)/3 + (2*b*Sqrt[d*Sec[e + f*x]]*(a + b*Tan[e + f*x]))/(3*f)
3.6.88.3.1 Defintions of rubi rules used
Int[(a_)*(Fx_), x_Symbol] :> Simp[a Int[Fx, x], x] /; FreeQ[a, x] && !Ma tchQ[Fx, (b_)*(Gx_) /; FreeQ[b, x]]
Int[1/Sqrt[sin[(c_.) + (d_.)*(x_)]], x_Symbol] :> Simp[(2/d)*EllipticF[(1/2 )*(c - Pi/2 + d*x), 2], x] /; FreeQ[{c, d}, x]
Int[((d_.)*sec[(e_.) + (f_.)*(x_)])^(m_.)*((a_) + (b_.)*tan[(e_.) + (f_.)*( x_)]), x_Symbol] :> Simp[b*((d*Sec[e + f*x])^m/(f*m)), x] + Simp[a Int[(d *Sec[e + f*x])^m, x], x] /; FreeQ[{a, b, d, e, f, m}, x] && (IntegerQ[2*m] || NeQ[a^2 + b^2, 0])
Int[((d_.)*sec[(e_.) + (f_.)*(x_)])^(m_.)*((a_) + (b_.)*tan[(e_.) + (f_.)*( x_)])^2, x_Symbol] :> Simp[b*(d*Sec[e + f*x])^m*((a + b*Tan[e + f*x])/(f*(m + 1))), x] + Simp[1/(m + 1) Int[(d*Sec[e + f*x])^m*(a^2*(m + 1) - b^2 + a*b*(m + 2)*Tan[e + f*x]), x], x] /; FreeQ[{a, b, d, e, f, m}, x] && NeQ[a^ 2 + b^2, 0] && !IntegerQ[m]
Int[(csc[(c_.) + (d_.)*(x_)]*(b_.))^(n_), x_Symbol] :> Simp[(b*Csc[c + d*x] )^n*Sin[c + d*x]^n Int[1/Sin[c + d*x]^n, x], x] /; FreeQ[{b, c, d}, x] && EqQ[n^2, 1/4]
Result contains complex when optimal does not.
Time = 15.54 (sec) , antiderivative size = 239, normalized size of antiderivative = 2.32
| method | result | size |
| parts | \(-\frac {2 i a^{2} \left (\cos \left (f x +e \right )+1\right ) F\left (i \left (\csc \left (f x +e \right )-\cot \left (f x +e \right )\right ), i\right ) \sqrt {d \sec \left (f x +e \right )}\, \sqrt {\frac {1}{\cos \left (f x +e \right )+1}}\, \sqrt {\frac {\cos \left (f x +e \right )}{\cos \left (f x +e \right )+1}}}{f}+\frac {2 b^{2} \sqrt {d \sec \left (f x +e \right )}\, \left (2 i \cos \left (f x +e \right ) F\left (i \left (\csc \left (f x +e \right )-\cot \left (f x +e \right )\right ), i\right ) \sqrt {\frac {1}{\cos \left (f x +e \right )+1}}\, \sqrt {\frac {\cos \left (f x +e \right )}{\cos \left (f x +e \right )+1}}+2 i \sqrt {\frac {\cos \left (f x +e \right )}{\cos \left (f x +e \right )+1}}\, F\left (i \left (\csc \left (f x +e \right )-\cot \left (f x +e \right )\right ), i\right ) \sqrt {\frac {1}{\cos \left (f x +e \right )+1}}+\tan \left (f x +e \right )\right )}{3 f}+\frac {4 a b \sqrt {d \sec \left (f x +e \right )}}{f}\) | \(239\) |
| default | \(-\frac {2 \sqrt {d \sec \left (f x +e \right )}\, \left (3 i \cos \left (f x +e \right ) F\left (i \left (\csc \left (f x +e \right )-\cot \left (f x +e \right )\right ), i\right ) \sqrt {\frac {\cos \left (f x +e \right )}{\cos \left (f x +e \right )+1}}\, \sqrt {\frac {1}{\cos \left (f x +e \right )+1}}\, a^{2}-2 i \cos \left (f x +e \right ) F\left (i \left (\csc \left (f x +e \right )-\cot \left (f x +e \right )\right ), i\right ) \sqrt {\frac {\cos \left (f x +e \right )}{\cos \left (f x +e \right )+1}}\, \sqrt {\frac {1}{\cos \left (f x +e \right )+1}}\, b^{2}+3 i \sqrt {\frac {\cos \left (f x +e \right )}{\cos \left (f x +e \right )+1}}\, \sqrt {\frac {1}{\cos \left (f x +e \right )+1}}\, F\left (i \left (\csc \left (f x +e \right )-\cot \left (f x +e \right )\right ), i\right ) a^{2}-2 i \sqrt {\frac {\cos \left (f x +e \right )}{\cos \left (f x +e \right )+1}}\, \sqrt {\frac {1}{\cos \left (f x +e \right )+1}}\, F\left (i \left (\csc \left (f x +e \right )-\cot \left (f x +e \right )\right ), i\right ) b^{2}-6 a b -\tan \left (f x +e \right ) b^{2}\right )}{3 f}\) | \(276\) |
-2*I*a^2/f*(cos(f*x+e)+1)*EllipticF(I*(csc(f*x+e)-cot(f*x+e)),I)*(d*sec(f* x+e))^(1/2)*(1/(cos(f*x+e)+1))^(1/2)*(cos(f*x+e)/(cos(f*x+e)+1))^(1/2)+2/3 *b^2/f*(d*sec(f*x+e))^(1/2)*(2*I*EllipticF(I*(csc(f*x+e)-cot(f*x+e)),I)*(1 /(cos(f*x+e)+1))^(1/2)*(cos(f*x+e)/(cos(f*x+e)+1))^(1/2)*cos(f*x+e)+2*I*(c os(f*x+e)/(cos(f*x+e)+1))^(1/2)*EllipticF(I*(csc(f*x+e)-cot(f*x+e)),I)*(1/ (cos(f*x+e)+1))^(1/2)+tan(f*x+e))+4*a*b*(d*sec(f*x+e))^(1/2)/f
Result contains higher order function than in optimal. Order 9 vs. order 4.
Time = 0.09 (sec) , antiderivative size = 133, normalized size of antiderivative = 1.29 \[ \int \sqrt {d \sec (e+f x)} (a+b \tan (e+f x))^2 \, dx=\frac {\sqrt {2} {\left (-3 i \, a^{2} + 2 i \, b^{2}\right )} \sqrt {d} \cos \left (f x + e\right ) {\rm weierstrassPInverse}\left (-4, 0, \cos \left (f x + e\right ) + i \, \sin \left (f x + e\right )\right ) + \sqrt {2} {\left (3 i \, a^{2} - 2 i \, b^{2}\right )} \sqrt {d} \cos \left (f x + e\right ) {\rm weierstrassPInverse}\left (-4, 0, \cos \left (f x + e\right ) - i \, \sin \left (f x + e\right )\right ) + 2 \, {\left (6 \, a b \cos \left (f x + e\right ) + b^{2} \sin \left (f x + e\right )\right )} \sqrt {\frac {d}{\cos \left (f x + e\right )}}}{3 \, f \cos \left (f x + e\right )} \]
1/3*(sqrt(2)*(-3*I*a^2 + 2*I*b^2)*sqrt(d)*cos(f*x + e)*weierstrassPInverse (-4, 0, cos(f*x + e) + I*sin(f*x + e)) + sqrt(2)*(3*I*a^2 - 2*I*b^2)*sqrt( d)*cos(f*x + e)*weierstrassPInverse(-4, 0, cos(f*x + e) - I*sin(f*x + e)) + 2*(6*a*b*cos(f*x + e) + b^2*sin(f*x + e))*sqrt(d/cos(f*x + e)))/(f*cos(f *x + e))
\[ \int \sqrt {d \sec (e+f x)} (a+b \tan (e+f x))^2 \, dx=\int \sqrt {d \sec {\left (e + f x \right )}} \left (a + b \tan {\left (e + f x \right )}\right )^{2}\, dx \]
\[ \int \sqrt {d \sec (e+f x)} (a+b \tan (e+f x))^2 \, dx=\int { \sqrt {d \sec \left (f x + e\right )} {\left (b \tan \left (f x + e\right ) + a\right )}^{2} \,d x } \]
\[ \int \sqrt {d \sec (e+f x)} (a+b \tan (e+f x))^2 \, dx=\int { \sqrt {d \sec \left (f x + e\right )} {\left (b \tan \left (f x + e\right ) + a\right )}^{2} \,d x } \]
Timed out. \[ \int \sqrt {d \sec (e+f x)} (a+b \tan (e+f x))^2 \, dx=\int \sqrt {\frac {d}{\cos \left (e+f\,x\right )}}\,{\left (a+b\,\mathrm {tan}\left (e+f\,x\right )\right )}^2 \,d x \]