Find the principal values of each of the following: `sec^(-1)(2sin((3pi)/4))` (ii) `sec^(-1)(2tan((3pi)/4))`

Explanation

`sec^(-1)(2sin((3pi)/4))`

`=sec^(-1)(2 sin(pi/4))`

`=sec^(-1)(2 xx (1/sqrt2))`

`=sec^(-1)(sqrt2)`

`=pi/4`




ii) `sec^(-1)(2tan((3pi)/4))`
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