For those who believe Jesus is God?

This question is brought on by another question I saw. Why did Jesus pray to God? Why did he say upon his death, My God, why have you forsaken me? Why in Mark 10:18 and Luke 18:19 does Jesus correct the man who called him "good" and said the only one who is good is God? I'm sure there are more examples. I was also taught the trinity and that Jesus IS God but now I am starting to question that (and a lot of things I have been taught lol)