Re: Re: Exact value of Cos[Pi/17]
- To: mathgroup at smc.vnet.net
- Subject: [mg14876] Re: [mg14851] Re: Exact value of Cos[Pi/17]
- From: BobHanlon at aol.com
- Date: Mon, 23 Nov 1998 10:11:54 -0500
- Sender: owner-wri-mathgroup at wolfram.com
In a message dated 11/20/98 5:07:48 AM, hay at haystack.demon.co.uk writes:
>Christopher Gorski wrote in message <72tt9f$isg at smc.vnet.net>...
>>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.
>>cgorski at adelphia.net
>Christopher (using InputForm for Output cells)
>1/4*Sqrt[1/2*(15 + Sqrt + Sqrt[2*(17 - Sqrt)] +
> Sqrt[2*(34 + 6*Sqrt - Sqrt[2*(17 - Sqrt)] +
> Sqrt[34*(17 - Sqrt)] -
> 8*Sqrt[2*(17 + Sqrt)])])]
FunctionExpand does not do this on my system:
"Power Macintosh 3.0 (May 6, 1997)"
Prev by Date:
Re: Mechanical Systems Question
Next by Date:
mathlink & MS Visual C++ 6.0
Previous by thread:
Re: Exact value of Cos[Pi/17]
Next by thread:
reducing error of using NDsolve