Given

I come up with

So

And

So, how many rules did I violate or otherwise offend with this one?

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- Jun 3rd 2010, 07:48 AMMechEngIntegrate cosh x/(3 sinh x +4)
Given

I come up with

So

And

So, how many rules did I violate or otherwise offend with this one? - Jun 3rd 2010, 08:05 AMUnknown008
I never worked with sinh nor cosh but I can tell you this:

What you need to do from

is to use ln.

If you differentiate the denominator, you get 3, so:

From there, you can substitute back. :) - Jun 3rd 2010, 08:08 AMGeneral
**Personally, I will substitute ..** - Jun 3rd 2010, 08:31 AMMechEng
Ok...

Then it should look something like...

let

So...

And...

And...

So...

And finally...

- Jun 3rd 2010, 08:44 AMUnknown008
You seem to have forgotten your integrations...

or;

- Jun 3rd 2010, 08:52 AMGeneral
- Jun 3rd 2010, 08:58 AMUnknown008
- Jun 3rd 2010, 09:16 AMMechEng
Doh...

How about this then...

I just reviewed logarithmic differentiation and integration. I can't believe I missed that.

I don't recall seeing the absolute value being ephasized in my book either. Ah, nevermind, there it is.

- Jun 3rd 2010, 09:21 AMGeneral