If and be the th root of unity which subtend right angled at the origin

MATHEMATICS · Single correct · CBSE · Mathematics · Complex Numbers and Quadratic Equations · Complex Numbers and Quadratic Equations

Problem

z_1

and

z_2

be the

n

th root of unity which subtend right angled at the origin. Then,

n

must be of the form (1)

4k+1

(2)

4k+2

(3)

4k+3

(4)

4k