exslt-math:atan

Returns the arc tangent of the argument, the result being in the range -π/2 to +π/2 radians.

atan($arg as xs:double) ➔ xs:double

Arguments
	$arg	xs:double	The supplied angle in radians
Result		xs:double

Namespace

http://exslt.org/math

Links to specifications

EXSLT Math Module

Notes on the Saxon implementation

Saxon also implements the function math:atan() in namespace http://www.w3.org/2005/xpath-functions/math.