Option variable
tr_float_can_branch_complexDefault value: true
Tells the Maxima-to-Lisp translator to assume that the functions
acos, asin, asec, and acsc can return complex results.
The ostensible effect of tr_float_can_branch_complex is the following.
However, it appears that this flag has no effect on the translator output.
When it is true then acos(x) is of mode any
even if x is of mode float (as set by mode_declare).
When false then acos(x) is of mode
float if and only if x is of mode float.