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Sagot :

Réponse :

a.

sin BNF = BF/FN = 8/17 = 0,470588235

cos BNF = BN/FN = 15/17 = 0,882352941

tan BNF = BF / BN = 8/15 = 0,533333333

b.

sin CRI = CI/CR = 6/10 = 0.6

cos CRI = RI/CR = 8/10 = 0.8

tan CRI = CI/RI = 0.75

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