Thread:Tuner King 5/@comment-28838092-20140809113652

Imaginary units powers:

i^0 = 1

i^1 = -i

i^2 = -1

i^3 = -i

i^4 = 1

i^5 = i

i^6 = -1

i^7 = -i

i^8 = 1

If x is equal to a multiple of four then the answer is 1.

If x is one greater than a multiple of four then the answer is i.

If x is two greater than a multiple of four than the answer is -1.

If x is three greater than a multiple of four than the answer is -i. 