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**1. Homework Statement**

find dy/dx for y=ln(sec^(2)x)

**2. Homework 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?