...buy a solutions manual to a math text (or any other text for that matter) just to get an A?
I have...and most likely I'll do it again. Honestly though, would I feel cheated out of my education? Not really. Some will bash me for cheating, but 90% of those bashers would do the same if they were a math major. Don't get me wrong, the answers are here only to see what mistakes I made, they won't help me on an exam and such, but as far as homework grades go, they'll put me at the top of the class.
I'll still study the material hard and such, but what surprised me was that in my Statistics 400 class, half the class had answers to the textbook. It's normally extremely hard to get answers (much less complete answers) to texts, but I guess some kid stole the answer book and just gave it out to everyone. The professors never caught on, and I'll probably take Statistics 401 next semester...and they'll probably never catch on until I've gotten an A in the class.
I'm not advocating anyone buying an answer book, but like I said, these answers don't prepare you for exams. Anyone copying answers might get 100% on the homework, but fail exams completely (exams are worht 70% of the grade anyways). Luckily for me, I did well on my exams...but eh I got a B on them...but the 100% homework grade pushed me to an A. :)