[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: "e" e "ln'

To: <obm-l@xxxxxxxxxxxxxx>
Subject: Re: "e" e "ln'
From: "Paulo Jose Rodrigues" <pauloemanu@xxxxxxxxxx>
Date: Sun, 2 Sep 2001 09:02:24 -0300
References: <005601c13357$359038a0$1a30f1c8@666>
Reply-To: obm-l@xxxxxxxxxxxxxx
Sender: owner-obm-l@xxxxxxxxxxxxxx


As raízes da equaçãox^3-4x-1=0 são

x_1=2cos(2Pi/9)
x_2=2cos(8pi/9)
x_3=2cos(14pi/9)

Verifique com o auxílio da identidade que cos(3x)=4(cos(x))^3-3cos(x)

Follow-Ups:
- RES: "e" e "ln'
  - From: Guilherme Pimentel

References:
- "e" e "ln'
  - From: Hugo Iver Vasconcelos Goncalves

Prev by Date: RES: "e" e "ln'
Next by Date: Re: "e" e "ln'
Prev by thread: RES: "e" e "ln'
Next by thread: RES: "e" e "ln'
Index(es):
- Date
- Thread