acos

Type
Trigonometric Function

Purpose
The acos function calculates the arccosine of a numeric value. The result is an angle expressed in radians between 0 and p.

Syntax
acos( NUMERIC VALUE)

Returns
A numeric value.

Usage
The numeric value in a Trigonometric function can be a constant value (as shown below), a variable, a field value or an expression.
The valid range of the input value is -1 to 1

Examples
acos( 0.5)
Returns: 1.047195755

acos( -0.8)
Returns: 2.49809154