[MikeCT]

Originally posted by vash
in the real world, nobody cares that cos@+sin@ = 1.

and i am an engineer. if you blast thru a 3 page math problem, and on the last page, you forget to carry a negative sign through the problem, and get the wrong answer, you deserve partial credit. imagine the grades for a test with one problem. getting a Zero would hurt.

So you didn't do the problem correctly if you forgot to carry the negative. And grades are not the most important thing in the world, learning an attention to detail would be more important.