Question

How do I calculate with De Moivre:
z^4+36=0
?
z = complex number

Thanks.

Answer 1

z^4=36
z= \[\sqrt[4]{36}\]= 2.449489743

Answer 2

oops it's -36 so the result is 2.449489743i

Answer 3

There are 4 complex roots.. I need the trigonometric form :/
As x=cos(a)+isin(a)

Answer 4

sorry but don't know anything about trigonometry

Answer 5

thanks anyway :o
Anyone? :(
Medals given.