Find the Phase in 1D

The questions below are due on Thursday May 08, 2025; 02:00:00 PM.
 
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The signals shown in the left column are periodic in n with period N=20. The functions shown in the right column show the angles of Fourier series. For each signal, indicate which (if any) of the angle plots represents the angles of that signal's Fourier series coefficients (where an "X" indicates an undefined phase).

Which angle plot matches with each signal?

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