\[ \int \frac {1}{\sqrt {\tan (c+d x)} \sqrt {a+i a \tan (c+d x)}} \, dx \]
Optimal antiderivative \[ \frac {\left (\frac {1}{2}-\frac {i}{2}\right ) \arctanh \left (\frac {\left (1+i\right ) \sqrt {a}\, \left (\sqrt {\tan }\left (d x +c \right )\right )}{\sqrt {a +i a \tan \left (d x +c \right )}}\right )}{d \sqrt {a}}+\frac {\sqrt {\tan }\left (d x +c \right )}{d \sqrt {a +i a \tan \left (d x +c \right )}} \]
command
integrate(1/(a+I*a*tan(d*x+c))^(1/2)/tan(d*x+c)^(1/2),x, algorithm="giac")
Giac 1.9.0-11 via sagemath 9.6 output
\[ -\frac {{\left (i \, a \sqrt {{\left | a \right |}} - {\left | a \right |}^{\frac {3}{2}}\right )} \log \left (-\frac {-i \, {\left (\frac {\sqrt {2} \sqrt {i \, a \tan \left (d x + c\right ) + a} {\left (-\frac {i \, {\left | a \right |}}{a} + 1\right )} {\left | a \right |}^{\frac {3}{2}}}{a^{2}} - \frac {\sqrt {-2 \, {\left (i \, a \tan \left (d x + c\right ) + a\right )} a + 2 \, a^{2}} {\left (\frac {\tan \left (d x + c\right )}{\sqrt {\frac {{\left (i \, a \tan \left (d x + c\right ) + a\right )}^{2} - 2 \, {\left (i \, a \tan \left (d x + c\right ) + a\right )} a + a^{2}}{a^{2}}}} + 1\right )} {\left | a \right |}}{a^{2}}\right )}^{2} + 8 \, \sqrt {2} + 12}{2 \, {\left (\frac {1}{2} i \, {\left (\frac {\sqrt {2} \sqrt {i \, a \tan \left (d x + c\right ) + a} {\left (-\frac {i \, {\left | a \right |}}{a} + 1\right )} {\left | a \right |}^{\frac {3}{2}}}{a^{2}} - \frac {\sqrt {-2 \, {\left (i \, a \tan \left (d x + c\right ) + a\right )} a + 2 \, a^{2}} {\left (\frac {\tan \left (d x + c\right )}{\sqrt {\frac {{\left (i \, a \tan \left (d x + c\right ) + a\right )}^{2} - 2 \, {\left (i \, a \tan \left (d x + c\right ) + a\right )} a + a^{2}}{a^{2}}}} + 1\right )} {\left | a \right |}}{a^{2}}\right )}^{2} + 4 \, \sqrt {2} - 6\right )}}\right )}{4 \, a^{2} d} - \frac {4 \, \sqrt {2} {\left (a \sqrt {{\left | a \right |}} + i \, {\left | a \right |}^{\frac {3}{2}}\right )}}{{\left ({\left (\frac {\sqrt {2} \sqrt {i \, a \tan \left (d x + c\right ) + a} {\left (-\frac {i \, {\left | a \right |}}{a} + 1\right )} {\left | a \right |}^{\frac {3}{2}}}{a^{2}} - \frac {\sqrt {-2 \, {\left (i \, a \tan \left (d x + c\right ) + a\right )} a + 2 \, a^{2}} {\left (\frac {\tan \left (d x + c\right )}{\sqrt {\frac {{\left (i \, a \tan \left (d x + c\right ) + a\right )}^{2} - 2 \, {\left (i \, a \tan \left (d x + c\right ) + a\right )} a + a^{2}}{a^{2}}}} + 1\right )} {\left | a \right |}}{a^{2}}\right )}^{2} - 4 i\right )} a^{2} d} \]
Giac 1.7.0 via sagemath 9.3 output
\[ \int \frac {1}{\sqrt {i \, a \tan \left (d x + c\right ) + a} \sqrt {\tan \left (d x + c\right )}}\,{d x} \]________________________________________________________________________________________