Don't blame you, that part of gears did my head in.
I orginally posted the calculus bit as a bit of a piss take. I do aplogise to the poster and the folk that took it seriously.
You get by day to day by being able to multiple/divide by 3 and 5. Trig doesn't come into it.
But along with some of the older posters on this thread it does fill me with a feeling of unease that youngsters are getting through there education with out the very basic principles of there physical world around them. Mathamatics in its abstract form doesn't really press my buttons. But when applied and used becomes relatively simple. Mind you the OP might be a wizz at statistics which I am !!!!e at and don't really understand.