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Parmi les angles ci-dessous, lequel a un sinus égal à -\frac{1}{2} et un cosinus égal à -\frac{\sqrt{3}}{2} ?
\frac{11\pi}{6}
\frac{4\pi}{3}
\frac{5\pi}{3}
\frac{5\pi}{6}
\frac{2\pi}{3}
\frac{7\pi}{6}
Aucune des autres propositions n'est correcte
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