1.

Integrate the with respect to x.ex sec x (1 + tan x)

Answer»

Let I = ∫ex (sec x + sec x tan x) dx

Take f(x) = sec x 

f‘ (x) = sec x tan x 

This is of the form of ∫ex[f(x) + f'(x)] dx = ex 

f(x) + c 

= ex sec x + c



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