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The non-real cube roots of unity are
A±1 ± i√3
B(1 ± i√3)/2
C(−1 ± i)/2
D(−1 ± i√3)/2
Answer & Solution
Correct answer: D. (−1 ± i√3)/2
They are cos 120° ± i sin 120°, which equals (−1 ± i√3)/2.
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