--> Tracé de la courbe du cosinus
0.20.40.60.811.2−0.2−0.4−0.6−0.8−1−1.20.20.40.60.811.2−0.2−0.4−0.6−0.8−1−1.2
A
π/6
π/4
π/3
π/2
2π/3
3π/4
5π/6
π
11π/6
7π/4
5π/3
π/2
4π/3
5π/4
7π/6
π/2
π
3π/2
S