Using reference angles, what is the exact value of $\tan (195°)$?

Which of the following pairs of angles have 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 $r$?

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.

$\sin\theta=\frac12$; $\tan\theta$ < $0$