Definition:Conic Section/Intersection with Cone/Degenerate Hyperbola
< Definition:Conic Section | Intersection with Cone(Redirected from Definition:Degenerate Hyperbola)Jump to navigation Jump to search
Let $\theta$ be half the opening angle of $C$.
Then $K$ is a conic section, whose nature depends on $\phi$.
Let $\phi < \theta$, that is: so as to make $K$ a hyperbola.
However, let $D$ pass through the apex of $C$.