.. _sinu:

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Sinusoidal (Sanson-Flamsteed)
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.. image:: ./images/sinu.png
   :scale: 50%
   :alt:   Sinusoidal (Sanson-Flamsteed)

MacBryde and Thomas developed generalized formulas for sever of the
pseudocylindricals with sinusoidal meridians:

.. math::

    x = C\lambda(m+cos\theta) / ( m + 1)

.. math::
    y = C\theta

.. math::

    C = \sqrt { (m + 1 ) / n }