Bas chords, although to i know they exist i never se them used in songs much. what i really want to know is can u get chord diagrams so u can learn how to play them. How do u find out how to use them?

Teacher. Get a teacher. Learn the theory behind them, and how to construct them. A diagram won't do that.

By the way...BASS. Please, BASS.

Jonas Hellborg came out with a pretty comprehensive 4-string chord dictionary. I don't remember who publishes it; it's long and skinny like a Zagat's, to fit inside an instrument case. Barnes & Noble sells it.

As Angus says, it's more beneficial (and actually easier) in the long run to learn some theory. I always found it easier to construct chords from the ground up than trying to remember 6000 chord diagrams.

Learn the fingerboard, then you can work off a guitar chord diagram if you must

YES LEARN THEORY

By just learning a bunch of chords and not knowing how and why they fit, you run the risk of playing like a trained monkey.

And monkeys don't rock. Baboons yes, but not monkeys.