“There you go.”

Your friend asked you to pass her a book.  You hand it to her & say:

There you go.

there you go   

You can also say "here you go" in the same way. While there are no absolute rules for when to use one or the other, I would use "here you go" if I brought something to them from far away, and "there you go" if I'm sitting in place and handing them the object.