Brain Dump

Hyperbola

Tags
math

Refers to two curves that are infinite and mirror reflections of each other. These generally have the form \( xy = a^2 \) or in parametric form \( (at, \frac{1}{t}) \).

\begin{figure}
  \centering
  \begin{tikzpicture}
    \begin{axis}[axis lines=middle,samples=400, ymin=-10, ymax=10]
      \draw[very thin, gray!30, step=1 cm](-3,-2.9) grid (2.9,2.9);
      \addplot[blue,domain=-3:3] {1/x};
      \draw[red!20, dashed, line width=0.5mm] (axis cs:0,-10) -- (axis cs:0,10);
      \draw[red!20, dashed, line width=0.5mm] (axis cs:-10,0) -- (axis cs:10,0);
      \node at (1, 2)[circle,fill,inner sep=1.5pt]{x};
      \filldraw[black] (1,2) circle (2pt) node[anchor=west] {Intersection point};
    \end{axis}
  \end{tikzpicture}

  \caption{Demonstration of a hyperbola.}
\end{figure}

Constant Area Property

The area between the \(x\) and \(y\) intercept of a tangent to any point on the hyperbola always has a constant area. This property of moving along some path while while guaranteeing some initial property of the problem stays constant: is known as a Locus.

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