You got a calculator? Good.Originally Posted bykendon

Your problem is this, you need a way to express trigonometric functions of certain angles in radical form. I remember when I was in 11th grade my cl*** was going insane with this so I have a trick which you can do.

For example,

Now, if you end up with a long decimal square,

But,

Now, that the square root back.

Important. When you square the sign always goes away. Therefore, if you had a sign in the beginning (and you did) when you need to attach a sign here.