If you delete an app, either accidentally or because you don‘t think you will use it, you can always get it back one of two ways.
If you have synced your iPad with iTunes since downloading the app, it will be in the Apps tab of your iPad‘s screen in iTunes. Just recheck the box for that app.
Without tethering to your computer, just find the app in the iTunes App store on the iPad and download it again.
You will see a prompt that you have already bought this app and an option to re-install it without having to pay for it again. It is a little nerve-racking, especially if the app is an expensive one. But don‘t worry so long as you are sure that was the app you deleted.
"iPad Tips and Tricks : Get Back a Deleted App "
Reference : top-ipad-video-converter.com