3. Unit Circle

What is the reference angle for a $240°$ angle?

Which of the following pairs of angles have the same reference angle?

Which expression can be used to determine the reference angle for an angle $\theta$ in standard position if $\theta >180°$ but $\theta <360°$?

Which equation can be used to determine the reference angle for an angle $\theta$ in standard position?

In Exercises 49–59, find the exact value of each expression. Do not use a calculator. sin (22𝜋/3)

Which set of ordered pairs represents angles in standard position that share the same reference angle?

Which of the following pairs of angles have the same reference angle?