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If cosec^2 x-2=0, then the value of x(0 ...

If `cosec^2 x-2=0`, then the value of x`(0 < x < 90^@)` is:
यदि `cosec^2 x-2=0`,है, तो x `(0

A

`15^@`

B

`45^@`

C

`30^@`

D

`60^@`

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