initial check-in of arduino docs in RST format (converted using wget+pandoc)

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+.. _arduino-cos:
+
+cos(rad)
+========
+
+Description
+-----------
+
+Calculates the cos of an angle (in radians). The result will be
+between -1 and 1.
+
+Parameters
+----------
+
+rad: the angle in radians (*float*)
+
+
+
+Returns
+-------
+
+The cos of the angle ("double")
+
+
+
+See also
+--------
+
+
+-  `sin <http://arduino.cc/en/Reference/Sin>`_\ ()
+-  `tan <http://arduino.cc/en/Reference/Tan>`_\ ()
+-  `float <http://arduino.cc/en/Reference/Float>`_
+-  `double <http://arduino.cc/en/Reference/Double>`_