If (cos theta+isin theta)(cos 2theta+isi...

If `(cos theta+isin theta)(cos 2theta+isin 2theta)….(cos ntheta+isin ntheta)=1`, then the value of `theta` is

A

`4mpi`

B

`(2mpi)/(n(n+1))`

C

`(4mpi)/(n(n+1))`

D

`(mpi)/(n(n+1))`

Verified by Experts

The correct Answer is:

C

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