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Path: utzoo!linus!decvax!tektronix!hplabs!oliveb!tymix!kanner
From: kanner@tymix.UUCP (Herb Kanner)
Newsgroups: net.math
Subject: math identity
Message-ID: <261@tymix.UUCP>
Date: Tue, 24-Jul-84 17:41:44 EDT
Article-I.D.: tymix.261
Posted: Tue Jul 24 17:41:44 1984
Date-Received: Sat, 28-Jul-84 06:28:01 EDT
Organization: Tymshare Inc., Cupertino CA
Lines: 8

The following assertion was found in the curiosity column of a magazine
addressed to mathematics instructors:

	tan(3*pi/11) + 4*sin(2*pi/11) = sqrt(11) exactly, but who cares?

Is the relation exact, or is it one of those extraordinally close
approximations?  I have confirmed it to 14 places.  If it is exact, can
anyone out there supply a proof?