alleryStart learning →Multiplying by e^x top and bottom, 1/(e^x + e^(-x)) integrates to what?
Atan^-1(e^(-x)) + c
Btan^-1(e^x) + c
Ce^x - e^(-x) + c
Dlog(e^x + e^(-x)) + c
Answer & Solution
Correct answer: B. tan^-1(e^x) + c
Multiply by e^x to get e^x/(e^(2x) + 1), then put t = e^x to obtain tan^-1(e^x).
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