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cos(+Number, -Result)

-Result is cos(+Number)

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

Description

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

This predicate can be used as a function in arithmetic expressions. In coroutining mode, if Number is uninstantiated, the call to cos/2 is delayed until this variable is instantiated.

Modes and Determinism

Exceptions

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

Examples

Success:
    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