The Fourier cosine series of a function is given by: f(x) = f,cos nx n=0 For...

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The Fourier cosine series of a function is given by: f(x) = f,cos nx n=0 For f(x) = cos4x, the numerical value of (f + f) is (round off to three decimal places) The Fourier cosine series of a function is given by: f(x) = f,cos nx n=0 For f(x) = cos4x, the numerical value of (f + f) is (round off to three decimal places)

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