ric shapes:
a circle, an ellipse, a parabola, or a hyperbola.
</span></div></div>
</div>
<div id="uid18" data-tralics-id="uid18" class="subsection" data-number="1.3.2"><h3><a href="#uid18" class="heading">Conic sections in polar coordinates</a></h3>
<p>All four conic sections can be described by the same function in polar coordinates:</p>
<div class="equation">\[ 
		  r(\theta) = \frac{q(1+\varepsilon)}{1 + \varepsilon\cos(\theta)}\,,
		 \]
</div><p class="noindent">where <span class="inline_math">\( q \)</