Question: [Numerical Analysis] Kindly refer to the photo: Using the infinity norm of the monic Chebyshev polynomial, derive a bound for the absolute error || E,

[Numerical Analysis]

Kindly refer to the photo:

Using the infinity norm of the monic Chebyshev polynomial, derive a bound for the absolute error || E, |- when the roots of the 3rd-degree Chebyshev polynomial are used to approximate the function f(x) = xsinx over [-1, 1]

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