So I made a table in which I would like to have a curly bracket, containing three formulas in one cell. I managed to make one that look right in the pdf, tho I still get an error message.
So this is what I want, and also what I get when I export to pfd. But there are a few errors that come up which I don't know how to fix.
\begin{center}
\begin{tabular}{l l}
\hline
Polaire vergelijking & Cartesiaans equivalent\\
\hline
$r \cos\theta = 2$ & $x=2$\\
$r^2\cos \theta \sin \theta = 4$ & $xy=4$\\
$r^2\cos^2\theta-r^2\sin^2\theta=1$ & $x^2-y^2=1$\\
$r=1+2r\cos\theta$ & \left\{ \begin{tabular} {@{}l@{}} $y^2-3x^2-4x-1=0$\\ $\sqrt{x^2+y^2}=1+2x$\\ $x^2+y^2=(1+2x)^2$ \end{tabular} \right.\\
\hline
\end{tabular}
\end{center}
\left\{
needs math mode so you need$
as in your other math mode cells – David Carlisle Dec 27 '20 at 18:25$\left\{
..........\right.$
meant this. – Imran Dec 27 '20 at 19:02