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peggy
@peggy
June 2021
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bonjour,
Je n'arrive pas du tout qui peut m'aider svp (exercice sur le cosinus)
Merci :)
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MichaelS
Verified answer
Somme des angles dans un triangle = 180°
AHB + HBA + BAH = 180°
ABH = 180 - AHB - BAH
ABH = 180 - 90 - 40
AHB = 50°
cos AHB = BH/BA
AB = BH / cos AHB
AB = 3 / cos 50
AB ≈ 4,7 cm
1 votes
Thanks 1
peggy
C'est ce que j'avais marquer Merci ;D
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Verified answer
Somme des angles dans un triangle = 180°AHB + HBA + BAH = 180°
ABH = 180 - AHB - BAH
ABH = 180 - 90 - 40
AHB = 50°
cos AHB = BH/BA
AB = BH / cos AHB
AB = 3 / cos 50
AB ≈ 4,7 cm