Question

Plz help:)
how z4 & z5 come?

Answer 1

@apoorvk Plz help:)

Answer 2

there's a 2pi/5 increase in the theta for every subsequent root right?

now add 2pi/5 to to the 4pi/5 in Z2. you get 6pi/5 right? now, 6pi/5 is the same as 2pi-6pi/5, that is -4pi/5.
Hence, Z4..

similarly for Z5.

Answer 3

so it means i can also put theta=6pi/5.

Answer 4

?*

Answer 5

or should i put -4pi/5

Answer 6

yeah you can put in 6pi/5 as well.
they mean the same things. check this out-