\( h = 10 \times 0.866 = 8.66 \) mètres.
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- \( \sin(60^\circ) = \frac{h}{10} \).
- \( h = 10 \times \sin(60^\circ) \).
- \( \sin(60^\circ) = \frac{\sqrt{3}}{2} \approx 0.866 \).
- #### 8.66 mètres
- #### 4 heures
- #### 8 cmUn phare est un monument dédié à la navigation, composé notamment d'une tour surélevée, d'un système d'éclairage puissant et d'un mécanisme assurant la rotation ou le mouvement constant de ce dernier afin d'assurer une visibilité optimale la nuit.
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