ACOS
Yields the Arc Cosine of a REAL value. Input and output values are in radians.
Arguments | |||
|---|---|---|---|
IN | IN | REAL | Must be in set [-1.0 .. +1.0] |
ACOS | Q | REAL | Arc-cosine of the input value (in set [0.0 .. PI]) = 0.0 for invalid input |
Example
(* FBD Program using "COS" and "ACOS" Functions *)
(* ST Equivalence: *)
cosine := COS (angle);
result := ACOS (cosine); (* result is equal to angle *)
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