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Author(s) Philippe Delsarte, Manon Oreins
Deadline No deadline
Submission limit No limitation
Category tags Trigo

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Trigonométrie - Q17

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Exprimer \(\cos \left( \alpha + \beta \right)\) en termes de \(x = \sin \alpha - \sin \beta\) et de \(y = \cos \alpha + \cos \beta\).