Aspire Faculty ID #18329 · Topic: AMU MCA 2017 · Just now
AMU MCA 2017

The integral $\int e^x (1+\tan x)\sec x , dx$ equals

Solution

$ e^x (1+\tan x)\sec x = e^x (\sec x + \sec x \tan x) $ Let $f(x)=\sec x$, then $f'(x)=\sec x \tan x$ $ \Rightarrow \int e^x [f(x)+f'(x)] dx = e^x f(x) + C $ $ = e^x \sec x + C $

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