MathGroup Archive 1998

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Trig Error



I discovered an error in the trigonometry functions of all places.  

The exact  value of Cot [11/2 Pi] is zero, but Mathematica 3.0 gives
ComplexInfinity (!) for the nearly equivalent 
Cot[17.2787595947438628115445386080397220812326`30.2181].  

Has anyone else noticed similar trig errors?

Loren Dill




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