title: how to split equation on two lines
body: <p>I wrote the following two equations in latex, but the problem is when I run the code, both equation are written on the same line</p>
  
  <p>how can I split them on two lines</p>
  
  <pre><code>\begin{equation}
  N = R * cos(lat) * sin(lon) \\
  E = R * cos(lat) * cos(lon)
  \label{eq:gps_to_cartesian}
  \end{equation}
  </code></pre>