sin^(-1) (sin. (2pi)/3)+cos^(-1)(cos. (7...

`sin^(-1) (sin. (2pi)/3)+cos^(-1)(cos. (7pi)/6) +tan^(-1)(tan. (3pi)/4)` का मान बराबर है :

A

`(11pi)/12`

B

`(17pi)/12`

C

`(31pi)/12`

D

`-(3pi)/4`

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