To believe means to have faith. In some instances both are defined as trust. Many kinds of faith are mentioned in the Bible. Let me answer these questions with a question.
Devils have more faith than most people.
The devils believe there is one God. They also believe what He has said is true. They believe He has prepared hell for Satan and his angels, and they know they are going to be there. That is the reason they tremble. In like manner, a human can believe in the existence of God and believe what the Bible says is true and still die and go to hell.