Trigonometric polynomial

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Notion

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Science and technology

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What Wikipedia says

In the mathematical subfields of numerical analysis and mathematical analysis, a trigonometric polynomial is a finite linear combination of functions sin(nx) and cos(nx) with n taking on the values of one or more natural numbers. The coefficients may be taken as real numbers, for real-valued functions.

Excerpt from the Wikipedia article “Trigonometric polynomial”, under the CC BY-SA 4.0 license. Read the article on Wikipedia