ong>, <strong><code>phi_1</code></strong>, <strong><code>theta_2</code></strong>, <strong><code>phi_2</code></strong>)</p>
</blockquote>
<p>Computes the angle separating two points (or a list of points) on a sphere, in radians.
params:</p>

<pre><code>- theta_1: Theta angle of the first point.
- phi_1:   Phi angle of the first point.
- theta_2: Theta angle of the second point.
- phi_2:   Phi angle of the second point.</code></pre>

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