# EXSLT - math:atan

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

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