I'm confused....is $\displaystyle sec x^2$ the same thing as $\displaystyle sec^2 x$? I was told you rewrite these as $\displaystyle sec (x^2) and (sec x)^2$, respectively.

Now I have a problem and I'm unsure how to do it since I don't know the above rule:

Find the derivative of f(Θ) = secΘ^2

How would you rewrite this and how would you proceed?

If I treat it as (secΘ)^2 I get: 2secΘ^2(tanΘ)

Thanks=]