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If, x,y inR , then the determinant: De...

If, `x,y inR` , then the determinant:
`Delta=|(cosx,-sinx,1),(sinx,cosx,1),(cos(x+y),-sin(x+y),0)|` lies in the interval .

A

`[-sqrt2,sqrt2]`

B

`[-1,1]`

C

`[-sqrt2,sqrt2]`

D

`[-1,-sqrt2]`

Text Solution

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The correct Answer is:
A
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