polish: cross-reference verification and final formatting

- Fix overfull hbox in ch05 method comparison table (118pt -> resolved)
- Fix overfull hbox in ch09 verification equation (147pt -> split with align)
- Fix overfull hbox in ch08 phase plane table (16pt -> p-column width)
- Fix overfull hbox in appA VOP formula (70pt -> inline textstyle)
- Fix overfull hbox in appB Fourier series table (70pt -> resizebox)
- Fix overfull hbox in appB common integrals table (tabular width)
- Fix overfull hbox in appB Laplace properties table (tabular width)
- Fix float too large in ch06 TikZ resonance figure (scale + clip)
- Fix text overfull in ch03 terminal velocity paragraph
- Fix ch09 summary table width with @{} column specifiers

chapters/ch06_mechanical_applications.tex

@@ -492,7 +492,7 @@ The amplitude $C(\omega)$ as a function of the forcing frequency is called the \
 
 \begin{figure}[htbp]
 \centering
-\begin{tikzpicture}[scale=0.9]
+\begin{tikzpicture}[scale=0.8, clip]
   \draw[->] (0,0) -- (6.5,0);
   \draw[->] (0,-0.3) -- (0,3.5);
   \node[below] at (6.5,0) {\small $\omega$};
@@ -507,8 +507,10 @@ The amplitude $C(\omega)$ as a function of the forcing frequency is called the \
   \draw[thick, blue!70] plot[domain=0.1:6.2, samples=300, smooth]
     ({\x}, {2.0 / sqrt((1 - 0.0816*\x*\x)^2 + (0.15*\x)^2)});
 
-  % Undamped curve (narrower, higher peak)
-  \draw[thick, red!60, dashed] plot[domain=0.1:6.2, samples=300, smooth]
+  % Undamped curve (narrower, higher peak) -- split around singularity at omega~3.51
+  \draw[thick, red!60, dashed] plot[domain=0.1:3.35, samples=150, smooth]
+    ({\x}, {2.0 / abs(1 - 0.0816*\x*\x)});
+  \draw[thick, red!60, dashed] plot[domain=3.65:6.2, samples=150, smooth]
     ({\x}, {2.0 / abs(1 - 0.0816*\x*\x)});
 
   % Legend