Réponse:

1. 5 30 45 60 85

Cos 0.99 0.86 0.71 0.5 0.08

Sin. 0.08 0.5 0.71 0.87 0.99

Tan. 0.08 0.58 1 1.73 11.4

3.cos a =adjacent sur hypothenuse

Sin a = oppose sur hypothenuse

Tan a = oppose sur adjacent