A geometrical proof of sum of $\cos n\varphi$ (Q2951122)
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scientific article
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | A geometrical proof of sum of $\cos n\varphi$ |
scientific article |
Statements
9 October 2015
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Lagrange's trigonometric identities
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sum of \(\cos n\varphi\)
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math.HO
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