(adsbygoogle = window.adsbygoogle || []).push({}); 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 withsin(x)cos(x)

the answer i am supposed to get is 2tan(x). where did i go wrong?

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# Homework Help: Derivative of the natural log

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