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Sagot :

Réponse:

Exercice 23 : • IB

• TB

• IT

donc cos TBI = TB/IB

sin TBI = IT/IB

tan TBI = IT/TB

Exercice 24 :

a. sin RDO = RO/RD

b. cos RDO = OD/DR

c. tan DRO = OD/OR

d. tan RDO = RO/OD

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