Find the reference angle for the given angle. (a) $150^{\circ}$ (b) $330^{\circ}$ (c) $-30^{\circ}$
Added by Cheryl W.
Step 1
Since $150^{\circ}$ is in the second quadrant, we can draw a right triangle with the angle $30^{\circ}$ (which is the complement of $150^{\circ}$) in the first quadrant. The reference angle is therefore $30^{\circ}$. (b) $330^{\circ}$: Show more…
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