1.

int (dx)/(tan x + cot x + sec x + cosec x) =

Answer»

`(1)/(2) (sin X - cos x + x) +c`
`(1)/(2) (sin x - cos x - tan x + COT x) + c`
`(1)/(2) (sin x- cos x-x) + c`
`(1)/(2) (sin x+ cos x - tan x - cot x) + c`

ANSWER :C


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