11.2 1) 45˚= 45˚·
π 180˚ =
45π 180 = π4
2) 60˚= 60˚·
π 180˚ =
60π 180 = π3 3) 75˚= 75˚·
π 180˚ =
75π 180 = 512π
4) 30˚= 30˚·
π 180˚ =
30π 180 = π6
5) 120˚= 120˚·
π 180˚ =
120π 180 = 23π 6) 315˚= 315˚·
π 180˚ =
315π 180 = 74π
7) 180˚= 180˚·
π 180˚ =
180π 180 =π 8) 270˚= 270˚·
π 180˚ =
270π 180 = 32π 9) 108˚= 108˚·
π 180˚ =
108π 180 = 35π
10) 36˚= 36˚·
π 180˚ =
36π 180 = π5 11) 135˚= 135˚·
π 180˚ =
135π 180 = 34π 12) 300˚= 300˚·
π 180˚ =
300π 180 = 53π
Trigonométrie : cercle trigonométrique Corrigé 11.2