\documentclass[a4paper,12pt]{article}

\documentclass[a4paper,12pt]{article}
\usepackage{rotating}
\usepackage{tabularx}

\begin{document}
\pagestyle{empty}

\begin{sidewaystable}
\begin{tabularx}{7cm}{|l|X|X|}
\hline
\textbf{normal} & \textbf{tilted} & \textbf{wider} \\
\hline
normal & \rotatebox{30}{I'm tilted!} & wider \\
\hline
\end{tabularx}
\end{sidewaystable}

\end{document}