Hey guys, Having trouble gettign my head around these indentities! So confusing so does anyone have a website which goes through the explanations systematically. My text books touches on it but the explanation doesn't cover all the variations. and the "letts AS Revisions guide" doesn't cover it at all which is rather annoying as i waitied for it and thought it would! Please help, I need a grade A in maths AS and its just holding me back!