
asin(+Number, -Result)

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



Arguments
   Number              A number.
   Result              Output: float.

Type
   Arithmetic

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

    Result is asin(Number)

    which should be preferred for portability.

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




Modes and Determinism
   asin(+, -) is det

Exceptions
     4 --- Number is not instantiated (non-coroutining mode only).
    24 --- Number is not of a numeric type.
    20 --- Illegal arithmetic operation: Number is greater than 1 or less than -1.
   141 --- Argument is of type breal

Examples
   
Success:
    Result is asin(1.0).		% gives Result = 1.5708
    Result is asin(-0,5).		% gives Result = -0.523599

Error:
    Result is asin(2.0).		% arithmetic exception


See Also
   is / 2
