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If x(r)=cos. (pi)/(2^(r))+ isin. (pi)/(2...

If `x_(r)=cos. (pi)/(2^(r))+ isin. (pi)/(2^(r))`, then `x_(1)x_(2)x_(3)....oo=`

A

0

B

`pi`

C

1

D

-1

Text Solution

Verified by Experts

The correct Answer is:
D
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