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[obm-l] Trigonometria
- To: obm-l@xxxxxxxxxxxxxx
- Subject: [obm-l] Trigonometria
- From: Roger <roger.lbd@xxxxxxxxx>
- Date: Wed, 26 Sep 2007 08:22:17 -0300
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Caros,
Bom dia,
Uma ajuda para concluir a seguinte questão:
Eliminando q nas equações:
x.senq +ycosq =2asenq
xcosq -ysenq =acosq , a>0, temos:
a) [(x+y)^2/3] - [(x-y)^2/3] = 2a[(x+y)^2/3]
b) [(x+y)^2/3] + [(x-y)^2/3] = 2(a^2/3)
c) [(x+y)^2] + [(x-y)^2] = a(x+y)
d) nenhuma das respostas anteriores
e) impossível eliminar q
Grato.