How is it that you're still not understanding what I stated? Yes, Trinitarianism
is monotheistic--there is only one God--
as I stated, but
it is not the same as monotheism. Trinitarianism, as Unitarianism, are concepts about the nature of God as he exists in and of himself. But, neither are equivalent to the concept of monotheism, that there is only one God as opposed to multiple gods.
https://www.thegospelcoalition.org/...n-and-essence-in-the-doctrine-of-the-trinity/
It absolutely is not. Again, you're erroneously equating monotheism with Unitarianism. The doctrine of the Trinity is that the one God is tri-personal; Unitarianism teaches that the one God is uni-personal.
It certainly does; that is precisely the reason the Athanasian Creed states what it does.