can you regenerate a magic card if its tapped?
can you regenerate a magic card if its tapped?
Yes.
419.6b Regeneration is a destruction-replacement effect. The word “instead” doesn’t appear on the card but is implicit in the definition of regeneration. “Regenerate [permanent]” means “The next time [permanent] would be destroyed this turn, instead remove all damage from it and tap it. If it’s an attacking or blocking creature, remove it from combat.” Abilities that trigger from damage being dealt still trigger even if the permanent regenerates.
Tapping it is not a cost of regenerate, it's an effect.