simplify Arg[E^(I x)]?

*To*: mathgroup at smc.vnet.net*Subject*: [mg125745] simplify Arg[E^(I x)]?*From*: Neal Becker <ndbecker2 at gmail.com>*Date*: Sat, 31 Mar 2012 03:42:16 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com

Why doesn't this simplify? Fullsimplify[Arg[E^(I x)], x \[Element] Reals] I expect to get 'x'. Is there some way I can get this to simplify?