.. _lang-cos:

cos()
=====

Calculates the cosine of an angle.

Library Documentation
---------------------

.. doxygenfunction:: cos

Arduino Compatibility
---------------------

The Maple ``cos()`` implementation is compatible with Arduino.

Note that the Maple implementation comes from `newlib
<http://sourceware.org/newlib/>`_\ , while Arduino's is that of
`avr-libc <http://avr-libc.nongnu.org/>`_\ .

See Also
--------

-  :ref:`sin() <lang-sin>`
-  :ref:`tan() <lang-tan>`
-  :ref:`float <lang-float>`
-  :ref:`double <lang-double>`

.. include:: /arduino-cc-attribution.txt