value = Atn ( Number )
value = ATan ( Number )
Computes the arc-tangent of a number.
PRINT Atn(0.5) 0.463647609001
Acsh / ACosh, Acs / ACos, Asn / ASin, Asnh / ASinh, Atnh / ATanh, Cos, Cosh, Deg, Rad, Pi, Sin, Sinh