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full revised notes of fourier series of engineering mathematics, Lecture notes of Mathematics
ourier series is a mathematical technique that allows the representation of a periodic function as a sum of sine and cosine functions of different frequencies. The basic idea behind Fourier series is that any periodic function can be expressed as an infinite sum of sinusoidal functions. These sinusoidal functions, known as harmonics, have frequencies that are integer multiples of the fundamental frequency of the periodic function. The Fourier series representation of a periodic function f(x) is given by: f(x) = a0 + Σ(an cos(nωx) + bn sin(nωx))
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