From: sgk@REMOVEtroutmask.apl.washington.edu   
      
   On Tue, 22 Oct 2024 20:50:27 +0000, Lawrence D'Oliveiro wrote:   
      
   > On Tue, 22 Oct 2024 07:14:22 -0000 (UTC), Steven G. Kargl wrote:   
   >   
   >> 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.   
   >   
   > What’s so special about 30°? Does that extend to 29° and 31° as well?   
      
   Did you take a high school trigonometry class?   
      
   --   
   steve   
      
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