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Sagot :

Bonjour,

Ex. 15 :

a) Cos angle en A = AC/AB = AB/AD

b) BC/BC = cos angle CBD

   BD/AD = cos angle BDA

Ex. 16 :

Sin angle SUN = SN/NU = 6/10 = 3/5

Cos angle SUN = SU/NU = 8/10 = 4/5

Tan angle SUN = SN/SU = 6/8 = 3/4

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