aidez moi svp
ABC est réctangle en A
ABC=35° (B=35°)
BC=9cm

calculer AC et AB svp

By: USER1369
27 Agustus 2025 mathematiques 5 minutes
4.5
113 views 113 comments 13 shares

Question

Grade: Education Subject: mathematiques
aidez moi svp
ABC est réctangle en A
ABC=35° (B=35°)
BC=9cm

calculer AC et AB svp
Asked by:
113 Viewed 113 Answers

Answer (113)

Best Answer
(171)

Bonjour,

Sin 35° = AC/BC = AC/9

donc : AC = Sin 35° × 9 = 5,612187....

Cos 35° = AB/BC = AB/9

donc : AB = Cos 35° × 9 = 7,372368.....

Answered on 27 Agustus 2025
(673)

Bjr

Pour AC

sin B = AC/BC

sin 35° = AC/9

AC = 9×sin35°

AC ≈ 5,16219 ...

Pour AB

cos B = AB/BC

cos 35° = AB/9

AC = 9×cos35°

AB ≈ 7,37237 ...

Voilà !

Answered on 27 Agustus 2025

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