MathGroup Archive 1998

[Date Index] [Thread Index] [Author Index]

Search the Archive

Exact value of Cos[Pi/17]

  • To: mathgroup at
  • Subject: [mg14833] Exact value of Cos[Pi/17]
  • From: "Christopher Gorski" <cgorski at>
  • Date: Wed, 18 Nov 1998 01:29:38 -0500
  • Sender: owner-wri-mathgroup at

In The Mathematica Book, there is an example on page 936 of Mathematica
returning the exact answer to Cos[Pi/17].  When I try it out on my NT
machine, however, (mathematica v.3), it simply returns Cos[Pi/17]. 
I've searched throughout the book, and I can't figure out how to get my
system to return a answer as in the example given.  It will return
simple things, Cos[Pi], for example, returns -1, but more complex
arguments won't work.

Christopher Gorski
cgorski at

  • Prev by Date: RE: Simplify
  • Next by Date: reducing error of using NDsolve
  • Previous by thread: RE: Re: Making a large matrix
  • Next by thread: Re: Exact value of Cos[Pi/17]