Question: Let f (x) = 2 tan x sec 2x, for 2 x 4. Determine the discrete least squares trigonometric polynomials Sn(x), using

Let f (x) = 2 tan x − sec 2x, for 2 ≤ x ≤ 4. Determine the discrete least squares trigonometric polynomials Sn(x), using the values of n and m as follows, and compute the error in each case.
a. n = 3, m = 6
b. n = 4, m = 6

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