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Elehello
@Elehello
May 2019
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Aidez- moi à l'exercice 2 s'il vous plaît !
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Bonsoir,
On va commencer par supposer que le mur est parfaitement vertical et, donc,
perpendiculaire au sol.
Le triangle HBP est donc rectangle en B
On a donc :
Cos 20° = HB ÷ HP = HB ÷ 9
donc : HB = Cos 20° × 9 ≈
8,46 m
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Aider moi a fairel'exercice 24 !
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J'arrive pas, c'est pour vendredi (physique chimie 4eme)
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Est ce que vous pouvez m'aider svp c'est un devoir maison et je ne comprends pas
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Lista de comentários
On va commencer par supposer que le mur est parfaitement vertical et, donc,
perpendiculaire au sol.
Le triangle HBP est donc rectangle en B
On a donc :
Cos 20° = HB ÷ HP = HB ÷ 9
donc : HB = Cos 20° × 9 ≈ 8,46 m