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joannebrd09
@joannebrd09
January 2021
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{cosinus} Luc a construit un triangle BHP dont la base BP mesure 15 cm, rectangle en P et dont l'angle PBH lsure 30 degrès.
Quelle est la longueur de HB au millimètre près ?
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rosiemuller2000
Verified answer
Coucou
cos30 = PB/HB
cos30 = 15/HB
cos30 * HB = 15
HB = 15/cos30
HB = 10√3
HB ≈17,320
HB mesure environ 17,320 cm
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Verified answer
Coucoucos30 = PB/HB
cos30 = 15/HB
cos30 * HB = 15
HB = 15/cos30
HB = 10√3
HB ≈17,320
HB mesure environ 17,320 cm