JEE Main 2019 — Math solution | Fundamenthol

JEE Main2019Math

Q.

If $\int e^{s e c x} (sec x tan x f (x) + sec x tan x + sec^{2} x)) d x = e^{s e c x} f (x) + C$ , then a possible cohoice of f(x) is :

A
$sec x - tan x - \frac{1}{2}$
B
$sec x + tan x + \frac{1}{2}$
C
$sec x + tan x - \frac{1}{2}$
D
$x sec x + tan x + \frac{1}{2}$

Solution

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