ArcTan(x,y)?

[toml_12953]

(04-05-2017 03:00 PM)StephenG1CMZ Wrote:  

(04-05-2017 12:26 PM)toml_12953 Wrote:  Wow! Thanks, Joe! You always answer so quickly, you must have a small parish to have this much time for the calculators!

Tom L

However, unlike ATAN2, ARG will not always work

Code:

 ATAN2_UNUSEDYX(YY,XX) 
 BEGIN //MY ATAN2
  IF XX==0 AND YY==0 THEN
   RETURN 0; //CONVENIENT;
  END;
  //-π..π 
  RETURN ARG(XX+*YY);//BUILT-IN HANDLES MOST
// the heiroglyphic is imaginary i
 END;

I don't understand what the first test is for. ARG((0,0)) returns 0 even without it.

Tom L