1.

If x in((-pi)/2, pi/2), then log sec x =

Answer»

`2 " cosech"^(-1) (cot^(2)frac(X)(2) - 1)`
`2 " cosech"^(-1) (cot^(2)frac(x)(2) + 1)`
`2 " coth"^(-1) ("COSEC"^(2)frac(x)(2) - 1)`
`2 " coth"^(-1) ("cosec"^(2)frac(x)(2) + 1)`

ANSWER :C


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