How do you determine the two coterminal angle (one positive one negative) for the angle $120^circ$ ?

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Answer 1 · 2017-02-17T05:05:46

$60^@, - 240^@$

Positive co-terminal --> $180 - 120 = 60^@$
Negative co-terminal --> $- 180 - 60 = - 240^@$

How do you determine the two coterminal angle (one positive one negative) for the angle 120^circ120^circ?