1.

If (cos^(2) theta - 4) x^(2) + (cot theta + sqrt(3)) + cos^(2) ""(3 pi)/(2) = 0 " hold " AA x in R" then " theta =

Answer»

`(5pi)/2,(11pi)/2`
`(5pi)/6, (11p)/6`
`(5pi)/3, (11pi)/3`
`(5pi)/4,(11pi)/4`

Answer :B


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