Re: Help find min poly.
From: Robin Chapman (rjc_at_ivorynospamtower.freeserve.co.uk)
Date: 02/14/05
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Date: Mon, 14 Feb 2005 13:30:29 +0000
Steve wrote:
> Hey I am trying to figure out how we would find the minimal
> polynomial of 2*cos(2*pi/7).
>
> Anyone have any ideas or a method for this?
It helps to note that 2 cos(2 pi/7) = z + 1/z
where z = exp(2 pi i/7).
--
Robin Chapman, www.maths.ex.ac.uk/~rjc/rjc.html
"Elegance is an algorithm"
Iain M. Banks, _The Algebraist_
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