Take k^10=Z
Therfore k=(1+√3 i/1−√3i)
You solve this by times both sides of the fraction by 1+√3 i [You can do this as this is the same as timsing by 1]
You get k=-1/2+1/2root3 i
You then use demoivres theorem as using normal binomail methods take too long
It states
(cos(theta)+isin(theta)^n=cos(ntheta)+isin(ntheta)
k=cos(2/3pi)+isin(2/3pi)
k^10=cos(20/3pi)+isin(20/3pi) [According to demovires theorem]
k^10=z so we found out what z is
z=-1/2+root3 /2 i
2*arcsin(-1/2) +5*arctan(root3/2 *2)=
-1/3pi+5/3pi=4/3pi