I am writing a beamer. I got lots of Missing $ inserted \end{frame}. Where I havent missed any $. this is the part of the code I have used where similar error is shown
\begin{frame}
\begin{normalsize}
Sectors and angle of each sectors are shown in Table 1:
\begin{table}[hb]
\caption{Sectors and Sector Angle}
\label{Sectors and Sector Angle}
\vspace{0.35cm}
\centering
\begin{tabular}{|c|c|}
\hline \textbf{SECTOR} & \textbf{DEGREE} \\
\hline Sector 1 & -30\leq\theta_s\leq30 \\
\hline Sector 2 & 30\leq\theta_s\leq 90 \\
\hline Sector 3 & 90\leq\theta_s\leq 150 \\
\hline Sector 4 & 150\leq\theta_s\leq-150 \\
\hline Sector 5 & -150\leq\theta_s\leq-90 \\
\hline Sector 6 & -90\leq\theta_s\leq-30\\
\hline
\end{tabular}
\end{table}
\end{normalsize}
\end{frame}
$...$
– AboAmmar Jun 26 '17 at 13:26{}
button to mark it as a code. That's what I've just did. – percusse Jun 26 '17 at 13:26