print 'Pocakaj, gre zelo pocasi...'
import numpy as np
import matplotlib.pyplot as plt

def f(t):
	return np.cos(0.75*np.pi*np.cos(t))

t=np.arange(0.0, 2*np.pi, 0.001)

plt.plot(f(t)*np.sin(t), f(t)*np.cos(t),'b-', np.sin(t), np.cos(t), 'g--')
plt.show()