Usually, the notation for the +3 is "Class Skill" or "CS", not "Misc." Just sayin'....Yes the +3 is indeed from formal training in the skill.
I'm going to have to change my mind and bow out as real life here as picked up considerably since I first gained interest in the game. Perhaps another time or another game in the future.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.