__author__ = 'local'


import matplotlib.pyplot as plt
import numpy as np
fig = plt.figure()
ax = fig.add_subplot(111)
x=[-15,-14,-13,-12,-11,-10,-9,-8,-7,-6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]
y=[]


for liczba in x:
    y+=[(np.cos(liczba)+3)/((liczba**2)+4)]



fig.suptitle('Wykres funkcji', fontsize=14, fontweight='bold')
ax.set_xlabel('oś x')
ax.set_ylabel('oś y')



plt.plot(x,y,'r')

plt.show()