If 1, a1, a2, a3, and a8, are nine, ninth roots of unity (taken in counter-clockwise sequence) then | (2 - Maths -

Question

If 1, a1, a2, a3, and a8, are nine, ninth roots of unity (taken in
counter-clockwise sequence) then | (2 - a1) (2 - ?3) (2 - ?5)
(2?a7) |= are what?

Adarsh Kumar Mandal · Accepted Answer

If 1, a1, a2, a3, and a8, are nine, ninth roots of unity (taken in counter-clockwise sequence) then | (2 - a1) (2 - ?3) (2 - ?5) (2?a7) |= are what?