
cos(+Number, -Result)

   Evaluates the trigonometric function cos(Number) and unifies the resulting
value with Result.



Arguments
   Number              A number.
   Result              A variable, float or breal.

Type
   Arithmetic

Description
   This predicate is used by the ECLiPSe compiler to expand evaluable
   arithmetic expressions.  So the call to cos(Number, Result) is
   equivalent to

    Result is cos(Number)

    which should be preferred for portability.

   In coroutining mode, if Number is uninstantiated, the call to cos/2 is
   delayed until this variable is instantiated.




Modes and Determinism
   cos(+, -) is det

Exceptions
     4 --- Number is not instantiated (non-coroutining mode only).
    24 --- Number is not of a numeric type.

Examples
   
Success:
      cos(0, 1.0).
      cos(1.2, Result).        (gives Result = 0.362358)
      cos(-33, Result).        (gives Result = -0.0132767)
Fail:
      cos(1, 0.0).
      cos(0, 1).
      cos(5, r).
Error:
      cos(A, 6.0).                   (Error 4).
      cos(4 + 2, 0.96017).           (Error 24).





See Also
   is / 2
