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The value of the determinant : Delta=...

The value of the determinant :
`Delta=|(a^2,a,1),(cosnx,cos(n+1)x,cos(n+2)x),(sinnx,sin(n+1)x,sin(n+2)x)|` is : in dependent is :

A

n

B

a

C

x

D

none of these

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The correct Answer is:
A
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