\textsf{ok the selection of graphs looks like an angle of $\displaystyle\frac{\pi}{6}$ intersecting $\sec{\theta}$ ?}\\
\textsf{$r=\sec \left(\theta \right)$ is a vertical straight line at $x=1$}
\textsf{in other words I lost!!!}
ok the selection of graphs looks like an angle of
$\displaystyle \displaystyle\frac{\pi}{6}$ intersecting $\displaystyle r=\sec{\theta}$
is a vertical straight line at
$\displaystyle x=1$