# Geparametriseerde 3D-kromme

import matplotlib.pyplot as plt
import numpy as np

from mpl_toolkits import mplot3d

plt.figure (figsize = (8, 8))

ax = plt.axes (projection = "3d")

t = np.linspace (0, 2 * np.pi, 200)
x = - np.sin (t)
y = np.cos (t)
z = (np.cos (t))**(-2)

ax.plot3D (x, y, z, color = "olive")

plt.show ()