Question

Can someone help me understand the unit circle please?

Answer 1

I don't understand how to get the side lengths, basically the whole thing confuses me.

Answer 2

What side lengths do you mean?

Answer 3

like when you have the unit circle my teacher made us do triangles on the inside

Answer 4

I drew this, does it clear up anything? :p
http://sketchtoy.com/64183790

Answer 5

it does alil i haven't had to do the tan, sin, and cos like that we had to do like \[\Pi/3\] something like that