The value of the determinants |{:(1,a,a^...

The value of the determinants `|{:(1,a,a^(2)),(cos(n-1)x,cos nx , cos(n+1)x),(sin(n-1)x , sin nx , sin(n+1)x):}|` is zero if

A

` x = n pi `

B

`x = n pi //2 `

C

`x=(2n+1)pi//2`

D

`x=(1+a^(2))/(2a)n in I `

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The correct Answer is:

A

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