WLC - Question 11
From Sensus Plenior
WLC - Question 11 How does it appear that the Son and the Holy Ghost are God equal with the Father?
WLC - Answer 11 The Scriptures manifest that the Son and the Holy Ghost are God equal with the Father, ascribing unto them such names, attributes, works, and worship, as are proper to God only.
WLC - Answer 11 (Bob) Addendum:
They existed before creation "In the beginning God":