from math import cos, sin, pi
import matplotlib.pyplot as plt
import numpy as np
abscisses=np.linspace(-pi, pi, 20) # 20 points dans [-pi, pi], régulièrement espacés.
plt.xlabel('x')
plt.figure(1)

#1ere sous-figure
plt.subplot(121)
ordonnees1=[cos(x) for x in abscisses]
plt.plot(abscisses, ordonnees1, label="cosinus")
plt.title("Graphe de la fonction cosinus")

#2e sous-figure
plt.subplot(122)
ordonnees2=[sin(x) for x in abscisses]
plt.plot(abscisses, ordonnees2, label="sinus")
plt.title("Graphe de la fonction sinus")

plt.show()

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