tan^(-1)sqrt(3)-sec^(-1)(-2)is equal to...

`tan^(-1)sqrt(3)-sec^(-1)(-2)`is equal to(A) `pi` (B) `-pi/3`(C) `pi/3` (D) `(2pi)/3`

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Let `tan^( −1)sqrt(3)=x `that is
`tanx= sqrt( 3) =tan( π/3)`
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