From: sgk@REMOVEtroutmask.apl.washington.edu   
      
   On Tue, 22 Oct 2024 04:26:59 +0000, Lawrence D'Oliveiro wrote:   
      
   > On Sun, 20 Oct 2024 05:35:25 -0000 (UTC), Steven G. Kargl wrote:   
   >   
   >> % gfcx -o z a.f90 && ./z 0.500000000      0.500089288   
   >>   
   >> One of these values is exact, and one of these raises FE_INEXACT.   
   >   
   > Does it work for 29° and 31° as well? What’s so special about 30°?   
      
   Really?  This is high school trig.   
      
   For units of degree, mathematically sin(30) = 1/2, exactly!.   
   sin(30+n*360) = 1/2 is also exact.   
      
   --   
   steve   
      
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