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If x,y inR, then the determinant Delta=|...

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

A

`[-sqrt2,sqrt2]`

B

`[-1,1]`

C

`[-sqrt2,1]`

D

`[-1,-sqrt2]`

Text Solution

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The correct Answer is:
A
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