.pa 1 .he 'ATAN, ATAN2 (III)'1/15/73'ATAN, ATAN2 (III)' .ti 0 NAME atan -- arc tangent function .sp .ti 0 SYNOPSIS jsr r5,atan[2] .sp .ti 0 DESCRIPTION The atan entry returns the arc tangent of fr0 in fr0. The range is -J/2 to J/2. .sp The atan2 entry returns the arc tangent of fr0/fr1 in fr0. The range is -J to J. .sp .ti 0 FILES kept in /lib/liba.a .sp .ti 0 SEE ALSO -- .sp .ti 0 DIAGNOSTICS there is no error return .sp .ti 0 BUGS --