figure-4-left.py

from pylab import *

fig = plt.figure(figsize=(8,4))

n = 256
X = np.linspace(-np.pi, np.pi, 256,endpoint=True)
C,S = np.cos(X), np.sin(X)
plot(X,C),plot(X,S)

savefig("figure-4-left.pdf")
show()