LaTeX question:



\begin{equation}
\Phi_{m}(\phi)=
\begin{cases}
\frac{\sin(m\phi)}{\sqrt{2\pi}} & \text{if
$m0$},\\
\frac{1}{\sqrt{2\pi}} &
\text{if $m=0$},\\
\frac{\cos(m\phi)}{\sqrt{2\pi}} & \text{if
$m0$}.
\end{cases}
\end{equation}



First it complains about the number of '}'s. if I take out the formulas, it
bitches about the &'s being inproperly placed Tab alignments or something to
that affect. If i take those out, it says that it dosen't recognize the
command \text.

will this work for anybody else?

thanks