# EXSLT - math:acos

Implementer Page: math.acos.html Function Package: math.acos.zip #### Function Syntax
    number math:acos(number)
The `math:acos` function returns the arccosine value of a number in radians. ## Implementations The following XSLT processors support `math:acos`: 4XSLT, from 4Suite. (version 0.12.0a3) libxslt from Daniel Veillard et al. (version 1.0.19) Implementations of `math:acos` are available in the following languages: Msxsl (by James Fuller) Javascript (by James Fuller)

http://www.exslt.org/math/functions/acos/index.html last modified 2002-11-12