Re: [obm-l] trigonometria

To: obm-l@xxxxxxxxxxxxxx
Subject: Re: [obm-l] trigonometria
From: "Renan Kruchelski Machado" <renankmachado@xxxxxxxxx>
Date: Thu, 29 Mar 2007 09:24:21 -0300
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tg x + sen x = m

tg x - sen x = n ==> senx = (m - n)/2 e tgx = (m+n)/2.

Ai lembrando que (cotg x)^2 + 1 = (cossec x)^2 tem-se

4/(m - n)^2 = 1 + 4/(m+n)^2 ==> 8mn = (m^2 - n^2)^2

Em 29/03/07, Julio Sousa <juliosousajr@gmail.com> escreveu:

eliminar o arco x na igualdade

tgx + senx = m e tgx - senx = n

--
Atenciosamente
Júlio Sousa