.. highlightlang:: us

.. _cos:

cos
===

.. index:: cos

.. us.tag  cos ENGLISH math-trigo

:ref:`cos` returns the cosine of its parameter.

.. function::  r = cos(m)

.. us.return

**Return Value**

*r* is the cosine of *m*.

.. us.params

**Parameters**

.. uparam:: m

   *m* is a real or complex matrix.

.. seealso::
   :ref:`overview-mathematic`,
   :ref:`acos`

:sub:`id-1566627`