how to get chaild page is a saperate page when inside master

Question

in my master page have some meta data tags

and same way in my chaild page have some meta tags ..the chaild page inside that master page .. now am running the page and viweing the page source now am getting master page meta data tags ..at this time i want to get my chaild page meta data tags ..one more this in chaild page title am getting dynamically from database ..this is my scinario please help me out this...