You dead right you can, and suprising I knew that. :p I haven't worked that much in Java so I can be quite forgetful about some things.
I personally think it would made more sense in Java if they could defined those functions without the Math class, and simply defined it in a package of Math. I know it is only semantics, but I think that is very important. Unforunetly, everything has to be wrapped in a class/interface in Java. But Math and the entry point (static void main) are 2 things straight off the top of my head that would make more sense outside of this OO constructs.
Up Munster! If anything in the above post does not make any sense it is probably cause I have a few drinks in me and just popped home for a second before heading out again. Muuunnnnssssttteeeer!!!!!