Section 8.5 Trigonometric Polynomial Approximation 9) Determine the discrete least squares trigonometric polynomial S3(x), using m = 4 for f(x) = excos 2x on the interval [-p, p]. Compute the error E(S3). Section 8.6 Fast Fourier Transforms 2) Determine the trigonometric interpolating polynomial of degree 4 for f(x) = x(p-x) on the interval [-p, p] using: Direct calculation; B. The Fast Fourier Transform Algorithm. 3) Use the Fast Fourier Transforms Algorithm to compute the trigonometric interpolating polynomial of degree 4 on [-p, p] for the following functions. f(x) = p (x- p) d. f(x) = x cos x2 + ex cos ex
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