67.86 Problem number 323

\[ \int \frac {\cot (e+f x)}{\sqrt {a+b \tan ^2(e+f x)}} \, dx \]

Optimal antiderivative \[ -\frac {\arctanh \left (\frac {\sqrt {a +b \left (\tan ^{2}\left (f x +e \right )\right )}}{\sqrt {a}}\right )}{f \sqrt {a}}+\frac {\arctanh \left (\frac {\sqrt {a +b \left (\tan ^{2}\left (f x +e \right )\right )}}{\sqrt {a -b}}\right )}{f \sqrt {a -b}} \]

command

integrate(cot(f*x+e)/(a+b*tan(f*x+e)^2)^(1/2),x, algorithm="giac")

Giac 1.9.0-11 via sagemath 9.6 output

\[ -\frac {\frac {2 \, \arctan \left (-\frac {\sqrt {a - b} \sin \left (f x + e\right )^{2} - \sqrt {a \sin \left (f x + e\right )^{4} - b \sin \left (f x + e\right )^{4} - 2 \, a \sin \left (f x + e\right )^{2} + b \sin \left (f x + e\right )^{2} + a}}{\sqrt {-a}}\right )}{\sqrt {-a}} + \frac {\log \left ({\left | -2 \, {\left (\sqrt {a - b} \sin \left (f x + e\right )^{2} - \sqrt {a \sin \left (f x + e\right )^{4} - b \sin \left (f x + e\right )^{4} - 2 \, a \sin \left (f x + e\right )^{2} + b \sin \left (f x + e\right )^{2} + a}\right )} {\left (a - b\right )} + {\left (2 \, a - b\right )} \sqrt {a - b} \right |}\right )}{\sqrt {a - b}}}{2 \, f \mathrm {sgn}\left (\sin \left (f x + e\right )^{2} - 1\right )} \]

Giac 1.7.0 via sagemath 9.3 output

\[ \text {Exception raised: TypeError} \]________________________________________________________________________________________