TI59 Diagnostic forensics

[johanw]

(07-26-2020 06:47 PM)Pjwum Wrote:  Basically it calculates the error of some seemingly arbitrary functions:

\begin{equation}
error = pol(rec(5 < 30)) - \sqrt{896 + 4} + \frac{\pi^2-fp(\pi^2)}{3^2}-1
\end{equation}

Sorry about my lack of understanding, I assume the < is a separator between radius and angle, but what do f and p stand for here?