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Q. Let z1 and z2 be nth roots of unity ...

Q. Let `z_1` and `z_2` be nth roots of unity which subtend a right angle at the origin, then n must be the form `4k`.

A

`4k + 1`

B

`4k + 2 `

C

`4k + 3 `

D

`4k `

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The correct Answer is:
d
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ARIHANT MATHS-COMPLEX NUMBERS-Exercise (Questions Asked In Previous 13 Years Exam)
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  13. Let A, B, C be three sets of complex number as defined below: A={z:Img...

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  19. Let z=costheta+isintheta. Then the value of sum(m->1-15)Img(z^(2m-1...

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  21. Let z(1) and z(2) be two distinct complex numbers and z=(1-t)z(1)+iz(2...

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