How do I train my dog to stop biting?

I have a 3-year-old white dog that I’ve had since she was a puppy. She often tries to bite us whenever we bathe her or even just touch her, and sometimes she bites for no reason at all. We’ve had other dogs before, but none have behaved as badly as she does.

Recently, while we were feeding our cats side notes: she grew up with those cats (she had her own food that she hadn’t even finished), she went over and ate the cats’ food. I yelled her name, and she came over to where I was sitting with one of the cats. She stared for a couple of seconds and then tried to bite the cat. I stopped her but ended up getting bitten myself.

Another time, I was moving a table near her while she was eating. She came over, licked my hand, went back to her bowl, and then came again and bit me. It’s really strange behavior. How can I fix this? Every time after she bite someone she goes to a corner and laid her head down and wouldnt face anyone for like 30 minutes and goes back to normal.