Q. 3

Mark the correct alternative in the following:

If , then is equal to

A. sec x tan x

B. sec x + tan x

C. tan x sec x

D. none of these

Answer :

Given:



Now


(Rationalizing we get)






sec x – tan x


In the given range tan x = -tan x and sec x is –sec x


-sec x-(-tan x)


tan x – sec x

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