For the principal values, evaluate the following: `sin^(-1)(-(sqrt(3))/2)+cos e c^(-1)(-2/(sqrt(3)))`
`sec^(-1)(sqrt(2))+2cos e c^(-1)(-sqrt(2))`
`sin^(-1)[cos{2cos e c^(-1)(-2)}]`
`cos e c^(-1)((2tan(11pi))/6)`

Explanation

(i) `sin^(-1)(-(sqrt(3))/2)+cos e c^(-1)(-2/(sqrt(3)))`


`=>-(pi)/3-(pi)/3`

`=>-(2(pi))/3`


(ii) `sec^(-1)(sqrt(2))+2cos e c^(-1)(-sqrt(2))`


`=>(pi)/4-2(pi)/4`

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