Sinc function approximation
The Endeavour 2025-06-23
Summary:
The sinc function sinc(x) = sin(x) / x comes up continually in signal processing. If x is moderately small, the approximation sinc(x) ≈ (2 + cos(x))/3 is remarkably good, with an error on the order of x4/180. This could be useful in situations where you’re working with the sinc function and the x in the denominator is awkward […]
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