Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.

Topic: computer algebra, beginner needs help
Replies: 17   Last Post: Jun 20, 2000 4:45 PM

 Search Thread: Advanced Search

 Messages: [ Previous | Next ]
 qdog Posts: 12 Registered: 12/8/04
Re: computer algebra, beginner needs help
Posted: May 31, 2000 8:59 PM
 Plain Text Reply

one way would be to use a computer algebra package like maple and graph
the two expressions and notice that they are equal, , however you need
to really know the Fundimental Trig. Identity that cos^2 + sin^2 = 1

and the Binomial Theorem, in this case (x+1)^2 = x^2 + 2x + 1
putting the two together gives you

x^2 + 2x + sin^2 = x^2 + 2x + 1 - cos^2 = (x+1)^2 - cos ^2

if you have a Mac with OS 8+, it comes standard with a graphing
calculator, use this first.

twma wrote:

> How do we know that two expressions are the same?
> For example, x^2+2x+sin^2x, (x+1)^2-cos^2x, are the same
> but where can I find algorithm to check them?
>
> I need BASIC references, web-sites
> in computer algebra for BEGINNERS.
>
> I did an internet-search but the result was not helpful.
> Perhaps, human intelligence is better.
>
> Thank you in advance.
>
> --
> ==================
> This article reflects my personal view only.
> twma@maths.uwa.edu.au

Date Subject Author
5/31/00 twma
5/31/00 qdog
6/1/00 dannyboy@here.com
6/1/00 Simon Langley
6/1/00 Richard Fateman
6/1/00 twma
6/1/00 Richard Fateman
6/3/00 twma
6/3/00 Ray Girvan
6/3/00 Richard Fateman
6/2/00 dannyboy@here.com
6/3/00 twma
6/3/00 dannyboy@here.com
6/5/00 Manuel Bronstein
6/9/00 David Bailey
6/11/00 Ranjnikanth Gedhada
6/11/00 Hendrik van Hees
6/20/00 Jeff Greif

© Drexel University 1994-2013. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.