sqrt((sec x - tan x )/( sec x + tan x ))...

`sqrt((sec x - tan x )/( sec x + tan x ))`, किसके बराबर है ?

A

`(1)/( sin x + cos x )`

B

`( 1 )/( tan x + cot x )`

C

` ( 1)/( sec x + tan x )`

D

`( 1)/( cosecx + cot x )`

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