-\colorbox{cas}{On CAS:} \\ Action \(\rightarrow\) Calculation
-\(\rightarrow\) Line \(\rightarrow\) \texttt{tanLine} or \texttt{normal}
+\begin{cas}
+ \textbf{In main}: Interactive \(\rightarrow\) Calculation \(\rightarrow\) Line \\
+ \-\hspace{1em} \texttt{tanLine(f(x), x, p)} \\
+ \-\hspace{1em} \texttt{normal(f(x), x, p)} \\
+ where \texttt{p} is the \(x\)-value of the coordinate
+
+ \textbf{In graph}: define function, then Analysis \(\rightarrow\) Sketch \(\rightarrow\) (Normal \textbar{} Tan line). Type \(x\) value to solve for a point. Return to show equation for line.
+\end{cas}