What is the problem here I get diffrent result ....
I think you mean not
Look to this formula carefaully (Assuming a dont equal 0):
Are you sure your problem is similar to it?
i.e. when you substituting , You will get your du in the numerator?
You forgot the in the first integral. Also its a definite integral, Its result must be a number not a function.
Oh sorry I didn't notice. I found it now here
http://www.mathhelpforum.com/math-he...rp-8-11-a.html