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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

[-1,1]

D

[1,4]

Text Solution

Verified by Experts

The correct Answer is:
B
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