यदि 2(cosec^(2)39^(@) -tan^(2)51^(@)) - ...

यदि `2(cosec^(2)39^(@) -tan^(2)51^(@)) - (2)/(3) sin 90^(@) -tan^(2) 56^(@)tan^(2)34^(@) = (y)/(3)` है , तो y का मान है :

A

1

B

`(2)/(3)`

C

`(-2)/(3)`

D

`-1`

Verified by Experts

The correct Answer is:

D

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