>>> from pujaBaixa import f
>>> from math import pi

>>> round(f(2*pi-0.02), 4)
0.2099
>>> round(f(2*pi), 4)
0.0
>>> round(f(2*pi+0.02), 4)
0.0033
>>> round(f(pi/2-0.01), 4)
4.7621
>>> round(f(pi/2), 4)
4.8105
>>> round(f(pi/2+0.01), 4)
4.8583
>>> round(f(-0.05), 4)
0.0024
>>> round(f(0), 4)
0.0
>>> round(f(0.05), 4)
0.0026
>>> round(f(5*pi/2-0.02), 4)
2.1819
>>> round(f(5*pi/2), 4)
2.061
>>> round(f(5*pi/2+0.02), 4)
1.9398
>>> round(f(-pi/2-0.02), 4)
0.2037
>>> round(f(-pi/2), 4)
0.2079
>>> round(f(-pi/2+0.02), 4)
0.212
>>> round(f(-pi/4-0.02), 4)
0.2324
>>> round(f(-pi/4), 4)
0.228
>>> round(f(-pi/4+0.02), 4)
0.2233
>>> round(f(3*pi-0.05), 4)
4.4509
>>> round(f(3*pi), 4)
4.4867
>>> round(f(3*pi+0.05), 4)
4.472