How do i make my answers from my calculator be in the form of square roots and fractions?

Question

We're learning with radians and sinus (idk the name in English i dont learn in America)

 

So i need to do in calculator sin(2pie:3) -and im already in radian mode- but the answer i need is this= square root 3:2.

instead i get answer like this= 0.866, but i need it to be like the top.

 Btw I have a casio fx82ms and im learning with radians so I need it with roots and fractions for homework and tests. Thanks!

I have a test in 4 days please answer before:)

Answer 1

You don't need a calculator to do this problem. Use your Unit Circle. 2π/3 = 120º

On the Unit Circle, it shows that the sin120 = (√3)/2.