1. The problem statement, all variables and given/known data find dy/dx for y=ln(sec^(2)x) 2. Relevant equations none 3. The attempt at a solution 1.)1/(sec(x)^2)*dy/dx sec(x)^2 2.)tan(x)/sec(x)^2 3.)i put it in terms of sin and cos... sin(x)/cos(x)*cos(x)^2/1 4.)i cancelled the cos(x) in the denominator and came out with sin(x)cos(x) the answer i am supposed to get is 2tan(x). where did i go wrong?