I'm sorry. Math is not my best subject. So if I ask some pretty simple questions, excuse me.
Ok, so is the cos(2lnx) part right? And for the inside function 2lnx, I didn't really know what to do with the 2 there. I know that the derivative of lnx is 1/x, but since the 2 was there, I used the product rule...which I guess is wrong?