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Isn't that just a u sub. Let u = tanxint(e^tanx)/cos^2(x)
Isn't that just a u sub. Let u = tanxint(e^tanx)/cos^2(x)
Anyone has guessed the substitution?This one should be harder.
I think I've masked the underlying substitution quite well.
I can reduce it but I can't evaluate it. Are you sure this integral is expressible in terms of elementary functions?Anyone has guessed the substitution?
tried this as my initial thought (i knew getting rid of the denominator was a necessary step), didn't get very far for some reason, maybe i made an arithmetical error somewhereOnce the substitution is uncovered, it is not much fun.
This one should be easier.