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cos(+Number, -Result)

Evaluates the trigonometric function cos(Number) and unifies the resulting value with Result.
A number.
Output: float or breal.


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


(4) instantiation fault
Number is not instantiated (non-coroutining mode only).
(24) number expected
Number is not of a numeric type.


    Result is cos(0).			% gives Result = 1.0
    Result is cos(1.2).			% gives Result = 0.362358
    Result is cos(-33).			% gives Result = -0.0132767

See Also

is / 2