(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Evaluate the integral:

(int sign) Sech³xTanhx dx

2. Relevant equations

Derivative of Sechx = -(SechxTanhx)

3. The attempt at a solution

Rewrite as:

Sech²xSechxTanhx

U=sechx

Du = -(SechxTanhx)dx

-Du = SechxTanhx dx

replace into integral

-(integral sign) U²du

Evaluate:

-U³ / 3

answer = -Sech³x / 3

??? It just seems like there should be more to it. What do you guys think?

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# Homework Help: Answer check, Hyperbolic trig identity (proof)

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