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[obm-l] Problema de trigonometria

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Subject: [obm-l] Problema de trigonometria
From: Felipe Takiyama <fitakiyama@xxxxxxxxxxxxxx>
Date: Fri, 29 Apr 2005 15:07:54 -0300
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Ajudem-me com esta:


Prove que 1/(cos6�)+1/(sen24�)+1/(sen48�)=1/(sen12�).
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