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Question

24. e sec x (1+ tanx) dx equals(A) e* cosx C(C) e sin x C(B) e secx C(D) e tan x C

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Solution

The given integration is,

e x secx( 1+tanx )dx = e x ( secx+secxtanx )dx

The given function is in the form of,

e x ( f( x )+ f ( x ) )dx = e x f( x )+C

Assume, f( x )=secx and f ( x )=secxtanx.

The integration of the given function is,

e x ( secx+secxtanx )dx = e x secx+C

Therefore, option (B) is correct.


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