Help me evaluate this integral, i am confused

[From: ] [author: ] [Date: 12-05-09] [Hit: ]

(integral of) - (((sech3x).(sinh3x))/(cosh3x)).dx

First of all, sinh 3x/cosh 3x = tanh 3x.
So you have to compute
-∫ sech 3x*tanh 3x dx.= 1/3 sech 3x + C.

keywords: confused,integral,evaluate,Help,this,am,me,Help me evaluate this integral, i am confused