acos()
Returns the angle, in radians, whose cosine is the specified radian expression. This is also called arccosine.
Syntax
acos(RADIAN_EXPR)
Required Parameter
RADIAN_EXPR
- Radian expression. This function returns
null
when it receives an argument value that is not a number.
Usage
json "{}" | eval acos=acos(0.866158094405463)
=> 0.5233333333333333 (30 * 3.14 / 180)
json "{}" | eval acos=acos(1) => 0
json "{}" | eval acos=acos("0") => null