## De Moivre's theorem~~HELP~

1. The problem statement, all variables and given/known data

Solve the following equations

z^3=-8i

Can anyone plz tell me how to solve this problem?
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 Recognitions: Homework Help You can use De Moivre's theorem (actually, are you meant to?) but there is an easier way to solve it. Notice that $$-8i=\left(2i\right)^3$$

 Quote by littlewombat 1. The problem statement, all variables and given/known data Solve the following equations z^3=-8i Can anyone plz tell me how to solve this problem?
Z=cuberoot(-8i)

So write (-8i) in r*e^(i*theta) form and then raise it to the one-third...then consider all the angles that theta could be as you round the unit circle once.

EDIT: I like Mentallic's way, haha.

Recognitions:
Homework Help

## De Moivre's theorem~~HELP~

 Quote by Apphysicist EDIT: I like Mentallic's way, haha.
Haha thanks