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In [6]:

    
import numpy as np
import matplotlib.pyplot as plt
from numpy import pi

x = np.arange(0, 2*pi, 0.1);
y = np.sin(x)
plt.plot(x, y)
plt.show()



In [8]:

    
np.pi









    Out[8]:





3.141592653589793



In [9]:

    
x = np.linspace( 0, 2*pi, 100 ) 
y = np.cos(x)

plt.plot(x, y)
plt.show()