you play the E and trill with G, and the other one you play F# and trill with the A.
Those are minor 3rd trills, listen to how they sound, I use them a lot.
BTW… you can’t trill a single note by itself… the very meaning of trill is to incorporate a 2nd note to the main note.
The trill note is the 2nd note. Like in the music you play an E and trill using the G.