From: sgk@REMOVEtroutmask.apl.washington.edu   
      
   On Wed, 23 Oct 2024 06:25:02 +0000, Lawrence D'Oliveiro wrote:   
      
   > On Wed, 23 Oct 2024 07:59:24 +0200, R Daneel Olivaw wrote:   
   >   
   >> Lawrence D'Oliveiro wrote:   
   >>   
   >>> On Wed, 23 Oct 2024 04:06:26 -0000 (UTC), David Jones wrote:   
   >>>   
   >>>> Did you take a high school trigonometry class?   
   >>>   
   >>> You seem obsessed with that.   
   >   
   > So your favourite functions return an exact result for sin 30°. Do they   
   > return an exact result for cos 30° as well?   
   >   
      
   Nope.  For REAL x, COSD(x) returns an exact result for all N >= 0   
   that satisfies 60+N*360 < 2**23.   
      
   --   
   steve   
      
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