determine if expression is polynomial P(x,y/Q(x,y)
Subject: determine if expression is polynomial P(x,y/Q(x,y)
From: Richard Fateman
Date: Sat, 25 Feb 2012 09:47:30 -0800
On 2/25/2012 9:34 AM, Stavros Macrakis wrote:
> But beware of things like trigonometric identities (as RJF says),
> radicals, etc.
>
> -s
>
One of my favorite polynomial-producing expressions is along the lines
of cos(p*acos(x)).
For example, trigexpand(cos(5*acos(x)) is
5*x*(1-x^2)^2+x^5-10*x^3*(1-x^2) = 16*x^5-20*x^3+5*x