स्पष्टाधिकारः · Chapter Overview
From Sūrya Siddhānta — The Sun's Treatise of the Heavens, taught by Acharya T Krishnatrey. This lesson is free to read.
<pre data-block="statement">What this chapter covers | To find where a planet TRULY is, chapter 2 supplies the tools. It gives the world's earliest surviving table of sines — the jyā-ardha or "half-chord" — set at a step of 225′ with the Radius R = 3438. From that table the text computes the manda-phala, the epicycle correction that turns a planet's mean position into its true one. This is the mathematical engine on which every later chapter depends.</pre>