How to get back synced photos from itunes?

I have iphone 5 and i took many photos nut unfortunely i deleted a important photo i need that photo back how to do it

No recycle bin. When selecting Delete for a photo in the Camera Roll, a big red Delete Photo button is provided along with Cancel. Selecting Delete Photos means deleted.

Photos/videos in the Camera Roll can and should be imported by your computer as with any other digital camera. The Camera Roll is also included with your iPhone's backup which is updated by iTunes as the first step during the iTunes sync process. If you synced your iPhone with iTunes since the photos were captured by your iPhone and you haven't synced your iPhone with iTunes again since the photos were deleted, you can try restoring your iPhone with iTunes from your iPhone's backup.

If you have an iCloud account, you have the option to update your iPhone's backup wirelessly which is automatic when your iPhone is connected to a power source while connected to an available wi-fi network. With an iCloud account, you also have the Photo Stream option. All photos captured by your iPhone are placed in your iCloud Photo Stream. Deleting a photo from your iPhone's Camera Roll does not delete the photo from your Photo Stream.