In [1]:

import numpy as np
import matplotlib.pyplot as plt

In [2]:

def f(x):
    return(np.cos(x))
def T(x):
    return(1)
def E(x):
    return(f(x)-T(x))

In [3]:

h=np.linspace(0,1,200)
plt.plot(h,abs(E(h)))
plt.plot(h,0.5*h**2)

Out[3]:

[<matplotlib.lines.Line2D at 0x7f26eb49db20>]

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