I am writing a LaTeX document which contains a large table.  I have
rotated the table so it is in landscape view, but I need to alter the
margins and stop the header appearing on that page.

I am currently using the following packages:
\usepackage{graphicx}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{setspace}
\usepackage{amssymb}
\usepackage{verbatim}
\usepackage{rotating}
\usepackage[left=3cm, right=3cm, top=3cm, bottom=3cm]{geometry} %margins
\usepackage{fancyhdr} %headers and footers
\usepackage{epsfig}

\usepackage{psfig}
\usepackage{graphics}




The following config options:
\doublespacing  			% for double spacing requirement
\pagestyle{fancy}			% for putting a header
\lhead{${\cal PT}$-Symmetric Quantum Mechanics}
\chead{Sec. \thesection}
\rhead{\thepage}
\lfoot{}
\cfoot{}
\rfoot{}



The table looks like:

\begin{sidewaystable}\label{table:sip}
\centering
\footnotesize
...
\end{sidewaystable}