the amplitude and phase of the filter

4.21       Let xt = cos(2πωt), and consider the output
   k where ),
 |ak | ∞. Show
yt =
∞,k=−∞
akxt−k,
yt = |A(ω)| cos(2πωt + φ(ω)),where |A(ω)| and φ(ω) are the amplitude and phase of the filter, respec- tively. Interpret the result in terms of the relationship between the input series, xt, and the output series,    yt.Attached File: Student Country: United St

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