[obm-l] Equacao trigonometrica

To: Lista OBM <obm-l@xxxxxxxxxxxxxx>
Subject: [obm-l] Equacao trigonometrica
From: "Igor O.A." <igordiscussao@xxxxxxxxx>
Date: Wed, 30 Nov 2005 08:18:31 -0300
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Como resolvo

cos(x) . cos(5x) . cos(7x) = [sqrt(3)]/3 (tangente de 30º) ???

Obrigado.

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I G O R

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