Arcsec
From specialfunctionswiki
Properties
Proposition: $$\dfrac{d}{dz} \mathrm{arcsec}(z) = -\dfrac{1}{\sqrt{z^2-1}|z|}$$
Proof: █
Proposition: $$\dfrac{d}{dz} \mathrm{arcsec}(z) = -\dfrac{1}{\sqrt{z^2-1}|z|}$$
Proof: █