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The value of (cos"" (pi)/(2)+isin ""(pi)...

The value of `(cos"" (pi)/(2)+isin ""(pi)/(2))(cos ((pi)/(2^2))+isin((pi)/(2^2))) (cos ((pi)/(2^3))+isin((pi)/(2^3)))"`
`………."oo` is

A

`-1`

B

`1`

C

`0`

D

`sqrt(2)`

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The correct Answer is:
A
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