Anglit distribution

The probability density function for Anglit distribution is:

.. math::

f(x) = \sin(2x+\pi/2) = \cos(2x)

for :math:-\pi/4 \le x\le \pi/4.

The cumulative distribution function is:

.. math::

F(x) = \frac{1}{2} + \frac{1}{2}\sin(2x)

The following plots show the pdf and cdf:

.. image:: ../../../../tests/imgs/stats/continuous/anglit/anglitpdf.png :align: center :width: 480

.. image:: ../../../../tests/imgs/stats/continuous/anglit/anglitcdf.png :align: center :width: 480