» Mon Jul 09, 2012 11:13 pm
There's one thing to remember, though, all followers have a "primary" type weapon they use. Be it 1H, 2H, bow, etc.
They may pick up the bow you give them, but more often than not they'll revert back to their "primary" weapon.
Also, Faendal is a bow trainer - so that may help you because he should be a primary bow user.
Here's a link with a lot of info about followers. There's also a link to a Google spreadsheet with data.
http://www.uesp.net/wiki/Skyrim:Followers