Question

the real fourth root of unity??​

Answer 1

Quick Reference. A complex number z such that z 4=1. There are 4 fourth roots of unity and they are 1, i,−1 and−i. (See n-th root of unity.)

Answer 2

Quick Reference. A complex number z such that z 4=1. There are 4 fourth roots of unity and they are 1, i,−1 and−i. (See n-th root of unity.)