i is for Imaginary

i=√(-1)

i^2=-1

i^3=-i

i^4=+1

i^5=i=√(-1)

i^6=-1

i^7=-i

i^8=+1

i^9=i=√(-1)

i to the i th power:

i^i=0.207879576

-1^i=.04321392

1/(-1^i )=23.1408916

ln⁡(-1)= πi

ln⁡(i)= i(π/2)= 1.57079633i

ln-i=-i(π/2)=-1.57079633i