Revision as of 05:17, 19 September 2008 by Sje (Talk)

The basics of linearity

$ e^{(2jt)} $ --->[system]--->$ te^{(-2jt)} $

$ e^{(-2jt)} $ --->[system]--->$ te^{(2jt)} $

$ \cos x = \mathrm{Re}\{e^{ix}\} ={e^{ix} + e^{-ix} \over 2} $

$ \cos 2t = \mathrm{Re}\{e^{jt}\} ={e^{2jt} + e^{-2jt} \over 2} $

$ cos 2t = {e^{2jt} \over 2} + {e^{-2jt} \over 2} $

$ 1/2 e^{(2jt)} $ --->[system]--->$ 1/2 te^{(-2jt)} $

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