The center of a regular polygon of n sid...

The center of a regular polygon of n sides is located at the point z=0, and one of its vertex `z_(1)` is known. If `z_(2)` be the vertex adjacent to `z_(1)`, then `z_(2)` is equal to _____________.

A

`z_(1)(cos2pi/n+-isin2pi/n)`

B

`z_(1)(cospi/n +- isinpi/n)`

C

`z_(1)(cospi/(2n)+-sinpi/(2n))`

D

none of these

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The correct Answer is:

a

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