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

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Trigonométrie - Q22

(PrépaMDWoluwe)

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Soit \(x\) un angle compris entre \(0\) et \(180°\) tel que

\begin{equation*} sin(x)=-sin(x-\frac{\pi }{3}) \end{equation*}

Que vaut \(cos(x)\) ?