5. Are the following signals periodic? If yes, determine its period. Plot the periodic signals in Matlab for two fundamental periods a. x(1)=cos(2a)-cos(67)+-cos10#) –-cos(147a) 5 b. x()=cos(271)–cos(6/Zzr) c. x(t) = sin°(2nt) d. x(t)=cos'(27t) e. [n]=sin(n)

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Fourier Series

Most of the incidents studied in the field of Engineering and Science as a function of time. For example, current and voltage are in the alternating current circuit. These occasional activities can be analyzed in the activity components (fundamental frequency and harmonics) through a process called Fourier analysis.