[obm-l] Soma Trigonométrica

To: obm-l@xxxxxxxxxxxxxx
Subject: [obm-l] Soma Trigonométrica
From: Roger <roger.lbd@xxxxxxxxx>
Date: Mon, 22 Oct 2007 08:43:48 -0300
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Caros, Bom Dia.

Caiu em minhas mãos a seguinte questão que não consegui concluir.

Provar que:

S = sen1/(cos0.cos1) + sen1/(cos1.cos2) + sen1/(cos2.cos3) + ... + sen1/(cos1994.cos1995) = tg 1995

Desde já, grato por qualquer ajuda dispensada.