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A Fourier series is a set of harmonics at frequencies f, 2f, 3f etc. that represents a repetitive function of time that has a period of 1/f. A Fourier transform is a continuous linear function. The spectrum of a signal is the Fourier transform of its waveform. The waveform and spectrum are a Fourier transform pair.
what are the applications on elasticity
applications of simple pendulum
some application of trignomentry
You will use the numbers pi and e (or applications which use them).