import matplotlib.pyplot as plt
import numpy as np
def probabilidad(x1,x2,a):
n=100
X=(x2-x1)/a
X2=(x2+x1)/a
D=((n*np.pi)*X)
D1=((n*np.pi)*X2)
return (X - ((np.sin(D)*np.cos(D1))/n*np.pi))
X=np.linspace(1,1,num=10,)
plt.plot(X,probabilidad)
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