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Expand the function, f(x) = x cosx in a Fourier series valid on the interval -1 <x<t. You must show the details of your work

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Soin Гоа моя series for fin) = x cosa ,-ninen Now fen) = then f(-1) = a cosa -ncos (1) - - n cosa = -f(x) which is odd functioftar en abna π (n-1) © ь, ако Би bn = [n cos (2+1)x)) + - s cos(n+1) udu Minti) Mn+1) o ł acos (n+1) n + cos (n-1 nota Tn-1)

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