One period of a periodic signal x(t) is shown in the figure below. The coefficients of the trigonometric Fourier series an, a,, b, are respectively Note: You may want to check the symmetry of the signal first. x(t) 1 1 -1 O A. -4 0, 0, 4 0, 0, TT ОВ. OC. -4 0, O D. 4 0,

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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.