Please describe the problem:
Tan(90) is undefined (Though conceptually one usually thinks of it as infinity).  When you enter Tan(90) into gcalctool you get Tan(90°)=-8.618206661e+214 which is a finite number.  Though I understand a number of this magnitude in practice, is though of as infinite, it would be nice if the calculator returned the correct answer.

Steps to reproduce:
1. Enter Tan(90) into gcalctool
2. See finite number
3. 


Actual results:
See the finite number: -8.618206661e+214

Expected results:
return "undefined" or at least "infinity"

Does this happen every time?
Yes

Other information: