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[obm-l] exercicio trigonometria
- To: obm-l@xxxxxxxxxxxxxx
- Subject: [obm-l] exercicio trigonometria
- From: vinicius aleixo <viniciusaleixo@xxxxxxxxxxxx>
- Date: Wed, 18 Jan 2006 02:05:58 +0000 (GMT)
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falae Andr�..
f(x)=cosnx.sen5x/n
fa�a x=0 => f(x)=0
Bem, como o per�odo � 3pi, f(3pi)=0
cos(n*3pi).sen(5*3pi/n)=0
ora, cos(n*3pi) nunca � 0
logo, sen(15pi/n)=0, e n pode ser -> (1,-1,3,-3,5,-5,15,-15)
bem, caso queira propor os m�todos que utilizou seria bom para podermos discuti-los.
abra��o
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