# Matplotlib is a plotting library for the Python programming language for creating static, 
# animated, and interactive visualizations in Python


from math import radians
import numpy as np # installed with matplotlib
import matplotlib.pyplot as plt
def main():
x = np.arange(0, radians(1800), radians(12))
plt.plot(x, np.cos(x), 'b')
plt.show()
main()