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[obm-l] Tranforma��es Trigonom�tricas
- To: obm-l@xxxxxxxxxxxxxx
- Subject: [obm-l] Tranforma��es Trigonom�tricas
- From: "Pedro J�nior" <pedromatematico06@xxxxxxxxx>
- Date: Thu, 13 Sep 2007 23:56:34 -0300
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Ol� pessoal...
Queria, se poss�vel fosse, que algu�m pudesse me ajudar a ver uma sa�da pro probelma abaixo...
Problema
Sabe-se que um dos �ngulos internos de um tri�ngulo mede 120�. Se os outros dois, x e y, s�o tais que cosx / coy = (1+
�3)/2 , a diferen�a entre as medidas de x e y �:
a) 5�
b) 15�
c) 20�
d) 25�
e) 30�