सिद्धान्तशिरोमणि: गणिताध्याय (भास्कराचार्य - ग्रहगणित, मध्यमाधिकार व स्पष्टाधिकार सटीक)

261 Fig. 44 Verse 41. Alternate method of obtaining K 101530/H sin λ = para (say) where λ is the Sāyana longitude of the Sun ; then, (Para × k) / s = K where K is un-mandala-Karṇa First half of Verse 42. To obtain K when the Sun is on the prime-vertical— Para × s/k = Samavṛttakarṇa. Comm. From fig. 19, from the similarity of triangles BD ☉ and CMA, B ☉ / CA = ☉ D / AM ie. ☉ D = (B ☉ × AM) / CA ie. H sin δ = (H sin λ H sin ω) / R (a) Then consider the similarity of the first and the sixth latitudinal triangles ; then Unmandala Sanku / Krāntijyā = s / k (b) where s is the equinoctial shadow and k the Viṣuvat- Karṇa. Again taking that ☉ the Sun lies on the unman-