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13 January, 18:12

What reference angle in the first quadrant corresponds to = - 120? Answer in radians.

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  1. 13 January, 22:01
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    If you know that pu radians is 180 degrees, then all you need to do is take 180 - (-120) = 300. To 360, you get the terminal angle to be 60. 60/180=1/3, so the answer is 1/3pi radians
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