1. The problem statement, all variables and given/known data http://img206.imageshack.us/img206/9099/titleol2.jpg [Broken] http://g.imageshack.us/g.php?h=206&i=titleol2.jpg [Broken] Show the above statement is equivalent to : sec (2x) + tan (2x) 2. Relevant equations 3. The attempt at a solution First attempt in which I used the distributive Law early: http://img237.imageshack.us/img237/876/attempt1pf3.jpg [Broken] http://g.imageshack.us/g.php?h=237&i=attempt1pf3.jpg [Broken] Second attempt in which I first solved within the brackets and then used the Distributive Law later: http://img237.imageshack.us/img237/361/attempt2rz9.jpg [Broken] http://g.imageshack.us/g.php?h=237&i=attempt2rz9.jpg [Broken] Please help me. Thanks.