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In this Sinusoidual signal equation: <a href="http://i.imgur.com/EyGrQnP.png" rel="ugc">Equation</a><br />
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I know that <i>A_0 </i> is to shift the signal up or down, and the <i>A_n</i> is for the amplitude. What I don't understand however is when this equation is transformed into Fourier transform equation, the variable for the amplitude goes missing?<br />
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This is the fourier transform equation: <a href="http://i.imgur.com/BFArOVL.png" rel="ugc">Fourier Transform Equation</a><br />
Both <i>a_n</i> and <i>b_n</i> are variables for the phase. What about the variable for the amplitude?
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In this Sinusoidual signal equation: Equation (http://i.imgur.com/EyGrQnP.png)

I know that A_0  is to shift the signal up or down, and the A_n is for the amplitude. What I don't understand however is when this equation is transformed into Fourier transform equation, the variable for the amplitude goes missing?

This is the fourier transform equation: Fourier Transform Equation (http://i.imgur.com/BFArOVL.png)
Both a_n and b_n are variables for the phase. What about the variable for the amplitude?

Which is the variable for amplitude in fourier transform equation?

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