sin,cos函数图像绘制

import numpy as np
import pylab as pl
import matplotlib.font_manager as fm
import matplotlib
t=np.arange(0.0,2.0*np.pi,0.01)
s=np.sin(t)
z=np.cos(t)
pl.plot(t,s,label='正弦')
pl.plot(t,z,label='余弦')
pl.xlabel('x-变量',fontproperties='SimHei',fontsize=18)
pl.ylabel('y-正弦余弦函数值',fontproperties='SimHei',fontsize=18)
pl.title('sin-cos函数图像',fontproperties='SimHei',fontsize=24)
pl.show()