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f(x)= x^2 exp (-x/3), 0<x<2
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to finde the coefficents of the first five harmoics of the fourier cosine series for f(x) and plots its approximate serises
to finde the coefficents of the first five harmoics of the fourier sine series for f(x) and plots its approximate serises
to plot the sine serise with n terms in the case of n=10,20,30,40 and 50
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