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NY3YE
@NY3YE
October 2020
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Bonjour, vous pouvez m'aidez en maths (je suis mauvais)
HLK est un triangle rectangle en K tel que sin( H)= racine carré de 2 sur 2.
a. Justifiez que cos au carré(H)= 1 sur 2
b. Sachant que HL=8cm, déterminer les longueurs HK et LK des deux côtés.
c.Quelles sont les valeurs exactes de cos(45°) et de sin(45°)?
Merci beaucoup !!!
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