f(x) is a symmetric periodic function of x i.e. f(x) = f(-x). Then, in general,

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f(x) is a symmetric periodic function of x i.e. f(x) = f(-x). Then, in general, the Fourier series of
the function f(x) will be of the form

Options:

A . .

B . .

C . .

D . .

Answer: Option B

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