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Question
Write a value of
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Solution
Let I= \[\int\] ex sec x(1 + tan x) dx
Let ex sec x = t
⇒ (ex sec x + ex sec x tan x)dx = dt
⇒ ex sec x (1 + tan x) dx = dt
= ex sec x + C \[\left( \because t = e^x \sec x \right)\]
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