Asked by ALISON

find reference angle

111degrees



and



-105



does it equal =75?


i don't know the first one

Answers

Answered by Damon
111 is in quadrant 2, between 90 and 180
180 - 111 = 69 degrees above -x axis

-105 (360-105 = 255) is in quadrant 3, between 180 and 270 degrees. 255-180 = 75 degrees below -x axis

Always sketch a graph of such problems.
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