In a book while doing an indefinite integral the author first wrote (sec(adsbygoogle = window.adsbygoogle || []).push({}); ^{2}x)^{1/2}= |sec x| , fine , then the author says the following :

"since we are doing an indefinite integral we can drop the absolute value bars" ,

now what is the justification for this ????

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# Indefinite integral

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