$image\Dql_0023.gif$ acos (arccosine)

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