Trinity: If Jesus is God, then who did he pray to? Did Jesus pray to himself? -

One Muslim polemic goes like this.
If a Muslim asks: "Is Jesus God?".
 Don't go for the trap of simply saying "yes.", because then you will open the door to a series of unproductive questions like: "Does God pray to himself"?
The Greek language was powerful enough to express "Jesus is God", but it does not say that.  You only find more nuanced statements such as this one:

For in him dwelleth all the fulness of the Godhead bodily.
--Colossians 2:9 (KJV)

There is a fundamental difference in terminology:  When Muslims say God they mean their one god, or, like God The Father.
When we say God we refer to the being who is manifested in three persons.
The confusion is that we also say "God", meaning God the Father.  Actually all three are equally God.