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If 'alpha' is a root x^(4)=1 with negati...

If `'alpha'` is a root `x^(4)=1` with negative principal argument, then the principal argument of `Delta(alpha)=|{:(1,1,1),(alpha^(n), alpha^(n+1),alpha^(n+3)),((1)/(alpha^(n+1)),(1)/(alpha^(n)),0):}|`is

A

`(5pi)/4`

B

`-(3pi)/4`

C

`pi/4`

D

`-pi/4`

Text Solution

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The correct Answer is:
B
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