Return cosine of a number

Contract
Return type	wob
No input parameters.

Water Contract
<method number.integer.cos/>

See also: acos, cosh, sin, asin, sinh, tan, atan, tanh, atan2, radians_to_degrees, degrees_to_radians, integer

Returns the cosine of a _subject of type integer .

1.<cos />

0.5403023058681398