matplotlib正弦和余弦图

代码：

# -*- coding: utf-8 -*-
"""
Created on Thu Jul 12 16:37:47 2018

@author: zhen
"""
"""
    正弦和余弦图
"""
import matplotlib.pyplot as plt

import numpy as np

x = np.linspace(-np.pi, np.pi, 256, endpoint=True)

y_cos = np.cos(x)
y_sin = np.sin(x)

plt.plot(x, y_cos)
plt.plot(x, y_sin)

title("Function $\sin$ and $\cos$")

xlim(-3.6, 3.6)
ylim(-1.0, 1.0)

# format ticks at specific values
xticks([-np.pi, -np.pi/2, 0, np.pi/2, np.pi],[r'$-\pi$', r'$-\pi/2$', r'$0$', r'$+pi/2$', r'$+\pi$'])
yticks([-1, 0, +1],[r'$-1$', r'$0$', r'$+1$'])

plt.show()

结果：