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If cos x=(-1)/2 and pi lt x lt (3 pi)/2,...

If `cos x=(-1)/2` and `pi lt x lt (3 pi)/2`, then the value of `2 tan^2 x+3 cosec^2 x` is:
यदि `cos x=(-1)/2` और `pi

A

4

B

10

C

8

D

16

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