import numpy as np
from matplotlib import pyplot as plt

plt.rcParams["figure.figsize"] = [7.50, 3.50]
plt.rcParams["figure.autolayout"] = True

x = np.linspace(-5, 5, 100)
y = np.cos(x)

plt.plot(x, y)

fontsize = 20
plt.title("\bf{y=cos(x)}", fontsize=fontsize)
plt.axis('off')

plt.show()