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why multiply by sec x + tan x? Why not sin x + cos x? Or csc x + cot x?

Thanks! That helped a lot.

But I am studying other subjects that interest me. I already have basic differential and integral calculus down and am starting to learn abstract algebra.

Sorry, I should have been more specific.

Can anyone explain the difference between a ring, a group, and a field in a way so that your average 13 year old can understand?

**fatulant**- Replies: 9

Anybody?

**fatulant**- Replies: 3

NO! Pie are round you dummie!

**fatulant**- Replies: 4

Z/6z?

links don't work

So what uses do they have?

**fatulant**- Replies: 3

and how do you find one?

**fatulant**- Replies: 32

Anyone have any ideas?

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