Where is std.math.expi?

[Bastiaan Veelo]

Hi,

I was looking for a way to use fsincos, which, according to 
https://dlang.org/phobos/std_complex.html#.expi, is used in 
std.math.expi. It is still listed as a member of that module, but 
the link is kaputt. Where did it go? I'd like to see its 
implementation.

Thanks,
Bastiaan.