How important are they? They seem to be pretty much invaluable, especially in a maintenance/repair setting, but are they really? The course I'm taking says that they teach them together because they feel it's easier, even though they are sometimes taught separate. But for some silly reason, I'm really having a mental block with mastering the concept.
How often do you actually use the T-N theorems in real life?
How often do you actually use the T-N theorems in real life?