Question

Let z1 and z2 be nth roots of unity which subtend a right angle at the origin. Then n must be of the form

Solution

Correct option is

4k

              

                   

SIMILAR QUESTIONS

Q1
Q2
Q3
Q4
Q5

cube root of unity, find the value of

                               

Q6
Q7
Q8

              

Q9

root of unity, then the value of

                         

Q10

If z­1 and z2 are two nth roots of unity, then  is a multiple of