The value of tan^(-1)(1)+cos^(-1)(-1/2)+...

The value of `tan^(-1)(1)+cos^(-1)(-1/2)+sin^(-1)(-1/2)` is equal to `pi/4` b.`(5pi)/(12)` c.`(3pi)/4` d. `(13pi)/(12)`

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Value of cos^(-1) (-(1)/(2)) + sin ^(-1)""(1)/(2) is: a) 2 pi b) (pi)/(2) c) pi d) none of these

A

`2 pi`

B

`(pi)/(2)`

C

`pi`

D

None of these

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