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If Delta =|{:(" "1,cos theta,1),(-cos th...

`If Delta =|{:(" "1,cos theta,1),(-cos theta," "1,cos theta),(-1,-costheta," "1):}|,then Delta "lies in"`
the intervail

A

[2,4]

B

(2,4)

C

[1,4]

D

[-1,1]

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A
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