acos (Function)
If -1 \<= p1 \<= 1, this function returns the arc-cosine (inverse cosine) value of p1.If the domain is invalid, it returns NULL. The value returned is in radian scale. This function wraps the java.lang.Math.acos() function.
Syntax
<DOUBLE> math:acos(<FLOAT|DOUBLE> p1)
Query Parameters
| Name | Description | Default Value | Possible Data Types | Optional | Dynamic |
|---|---|---|---|---|---|
| p1 | The value of the parameter whose arc-cosine (inverse cosine) value is found. | FLOAT DOUBLE | No | Yes |
Example 1
CREATE STREAM InValueStream (inValue double);
insert into OutMediationStream
select math:acos(inValue) as acosValue
from InValueStream;
If the inValue in the input stream is given, the function calculates the arc-cosine value of it and returns the arc-cosine value to the output stream, OutMediationStream. For example, acos(0.5) returns 1.0471975511965979.