File:Cosineplot.png

#!/usr/bin/python
import numpy as np
import matplotlib.pyplot as plt
from mpmath import *
from pylab import rcParams
rcParams['figure.figsize'] = 10, 10

x=np.arange(-2*pi,2*pi,0.00001);
f=np.vectorize(cos)
y=f(x)

fig, ax = plt.subplots()


xlabels = [item.get_text() for item in ax.get_xticklabels()]
xlabels=[r'$-2\pi$',r'$-\frac{3\pi}{2}$',r'$-\pi$',r'$-\frac{\pi}{2}$','$0$',r'$\frac{\pi}{2}$',r'$\pi$',r'$\frac{3\pi}{2}$',r'$2\pi$']
ax.set_xticks([-6.283185,-4.712388980,-3.1415926,-1.57079632,0.0,1.57079632,3.1415926,4.712388980,6.283185])
ax.set_xticklabels(xlabels,horizontalalignment='center')

ylabels = [item.get_text() for item in ax.get_yticklabels()]
ylabels[0]='$-1$'
ylabels[1]=r'$-\frac{1}{2}$'
ylabels[2]='$0$'
ylabels[3]=r'$\frac{1}{2}$'
ylabels[4]='$1$'
ax.set_yticks([-1.0,-0.5,0,0.5,1.0])
ax.set_yticklabels(ylabels,horizontalalignment='right')

plt.xlabel('$x$')
plt.ylabel(r'$\cos(x)$')

plt.plot(x,y,linewidth=2,color='Black')

plt.savefig('cosineplot.png',bbox_inches='tight',pad_inches=0.1)