Find the tangent line for the following: $(\operatorname{arcsec} x)^2$ at $x = 2$

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I have been doing a lot of tangent line problems and they follow a pretty basic pattern. Plug in $x$ to find the $y$ value. Find the derivative and the slope and then $b$. However, with these hyperbolic functions, my work is looking really messy and I am unsure how to find the $y$ value. I want to be able to do this without a calculator. Any help would be appreciated. Thank you.

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Sorry I don’t have time to put my work into text.

Hope it is clear enough.enter image description here

At $x=2$, the positive value should be taken.