File:Arccosplot.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(-1,1,0.0001);
f=np.vectorize(acos)
y=f(x)

fig, ax = plt.subplots()

xlabels = [item.get_text() for item in ax.get_xticklabels()]
xlabels=[r'$-1$',r'$-\frac{1}{2}$',r'$0$',r'$\frac{1}{2}$','$1$']
ax.set_xticks([-1,-0.5,0,0.5,1])
ax.set_xticklabels(xlabels,horizontalalignment='center')

ylabels = [item.get_text() for item in ax.get_yticklabels()]
ylabels[0]=r'$\pi$'
ylabels[1]=r'$\frac{2\pi}{3}$'
ylabels[2]=r'$\frac{\pi}{2}$'
ylabels[3]=r'$\frac{\pi}{3}$'
ylabels[4]=r'$0$'
ax.set_yticks([3.14159,2.09439,1.570796,1.04719755,0.015])
ax.set_yticklabels(ylabels,horizontalalignment='right')

plt.xlabel('$x$')
plt.ylabel('$\mathrm{arccos}(x)$')

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

plt.savefig('arccosplot.png',bbox_inches='tight',pad_inches=0.15)