Question

integral of -sec(2x)tan(2x)???? I have no idea???

Answer 1

do you recognize \(\sec(x)\tan(x)\) as the derivative of some function?

Answer 2

what i am trying to say is that this really doesn't require any technique of integration. if you look in your calc book you will see that the derivative of \(\sec(x)\) is \(\sec(x)\tan(x)\)

Answer 3

you do have the \(2x\) to worry about, and also the minus sign, but no frets there, just make sure to put a minus sign and divide by 2