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If tan^2 x-3 sec^2 x+3=0, then the value...

If `tan^2 x-3 sec^2 x+3=0`, then the value of x `(0lexle90^@)` is :
यदि `tan^2 x-3 sec^2 x+3=0`, तब x का मान क्या है `(0lexle90^@)`

A

`60^@`

B

`0^@`

C

`30^@`

D

`45^@`

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