How do I solve this integral?
As stated the title, I get to a point which I can't do anything, and I'm sure I've made a mistake some where, here is my full working out:
But () so the equation should become:
And this is where I'm stuck, I can't simply take away from both sides, that would make
What have a messed up in the process? And just to make it clear someone in a previous question didn't under understand what was, it's the same as , thank you in advance.