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?

If $\theta$ is an angle in standard position such that $\theta >180°$ and $\theta <360°$, which equation can be used to determine the reference angle $r$?

In Exercises 35–60, find the reference angle for each angle. -13𝜋/3

Identify the reference angle of each given angle.

120°

Identify the reference angle of each given angle.

$\(\frac{7\pi}{4}\)$ rad

Identify the reference angle of each given angle.

210°

Identify what angle, $\(\theta\)$ , satisfies the following conditions.

$\(\sin\]\theta\)=\(\frac\)12$; $\(\tan\]\theta\)$ < $0$