Yes, being an Army guy, I should never forget the A-10, our best friend from the Air Force. I suspect the A-10 can deal effectively with a T-90. But having a few on hand to test would be the ticket.
I would think that if nothing else, the A-10s could detonate the tanks’ reactive armor, which would then allow a TOW or Hellfire missile to take it out. I know the nose cannon alone made hash out of Saddam’s pussies during Gulf II.