ACos

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ColdFusion CFML Reference User Guide
Applies to: ColdFusion

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Description

Arccosine function. The arccosine is the angle whose cosine is number.

Returns

The arccosine, in radians, of a number.

Category

Mathematical functions

Function syntax

ACos(number)

See also

Cos, Sin, ASin, Tan, Atn, Pi

Parameters

Parameter

Description

number

 Cosine of an angle. The value must be between -1.0 and 1.0, inclusive.

Usage

The range of the result is 0 to p. To convert degrees to radians, multiply degrees by p/180. To convert radians to degrees, multiply radians by 180/p.

Example 

<cfscript>
   number=0.5;
   writeOutput(acos(0.5));  // Returns 1.04719755
</cfscript>

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