Re: [math-fun] Cubic eqn w/3 real roots: trig soln

From: "mcintosh@servidor.unam.mx" <mcintosh@servidor.unam.mx> To: math-fun <math-fun@mailman.xmission.com>; Henry Baker <hbaker1@pipeline.com> Cc: math-fun@mailman.xmission.com; mcintosh@servidor.unam.mx Sent: Sun, December 6, 2009 9:59:13 PM Subject: Re: [math-fun] Cubic eqn w/3 real roots: trig soln ... The cubic version is but a modest extension of the double angle formula, but how many trig or geometry courses get that far? I once got into very hot water (fired, in fact) for showing a similar derivation to a *college* trig class. ... ________________________________ Which college? Give us a forewarning, so that we can avoid the place. -- Gene