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Hi,
The idea is that a function can be decomposed into an infinite series of sine and cosine waves. The amplitudes of each harmonic depend on the wave shape.
This idea is not really unique to sine waves however, as a power series works in a somewhat similar manner but using powers of the variable instead.
The nice thing about sine terms though is that they can be more easily evaluated when working with electronics because sine signals are just AC signals, so AC analysis can be used with sine terms.
Fourier actually found this stuff out when trying to solve heat flow problems.
The idea is that a function can be decomposed into an infinite series of sine and cosine waves. The amplitudes of each harmonic depend on the wave shape.
This idea is not really unique to sine waves however, as a power series works in a somewhat similar manner but using powers of the variable instead.
The nice thing about sine terms though is that they can be more easily evaluated when working with electronics because sine signals are just AC signals, so AC analysis can be used with sine terms.
Fourier actually found this stuff out when trying to solve heat flow problems.
