<p>A few months ago I posted a question over at <a href="https://math.stackexchange.com/">https://math.stackexchange.com/</a>.</p>

<p>The <a href="https://math.stackexchange.com/questions/1600069/error-in-distance-between-points-in-spherical-coordinates">question</a> is related to error analysis, and it got no answer over there.</p>

<p>Is it acceptable to re-post it here?</p>
