Question

how to find the roots of a complex number?

Answer 1

You are looking for what's called "roots of unity"

Answer 2

Unless, you are looking for just the square root. The square root is a special case we can handle algebraically.

Answer 3

idk Really what u refer to But i think that may help u
the complex no. is denoted by (i)
where (i)=sqrt-1
so: (i)^2=-1
so:(i)^3=(i)^2.(i)=-(i)
so:(i)^4=(i)^2.(i)^2=-1.-1=1
& So On.....

Answer 4

@JopHP , he is looking for an application of De moivre's theorem in trigonometry.

Answer 5

"Finding the nth roots of unity"

Answer 6

hmmm..
i got it
thnx @inkyvoyd

Answer 7

yes @inkyvoyd i am looking for de moivre's theorem...

Answer 8

(cosx + i.sinx)^(N)=[cos(x+2.Pi.r) + i.sin(x+2.Pi.r)]^(N)

=[(cos.N.(x+2.Pi.r) + i.sin.N.(x+2.Pi.r)]