# Exercise 5.29

# Parabola

import numpy as np
x = np.linspace(0, 2, 20)
y = x*(2 - x)
import matplotlib.pyplot as plt
plt.plot(x, y)
plt.show()

# Cos(18*pi*x) - first try

import numpy as np
x = np.linspace(0, 2, 20)
y = np.cos(18 * np.pi * x)
import matplotlib.pyplot as plt
plt.plot(x, y)
plt.show()

# Cos(18*pi*x) - second try

import numpy as np
x = np.linspace(0, 2, 1000)
y = np.cos(18 * np.pi * x)
import matplotlib.pyplot as plt
plt.plot(x, y)
plt.show()