A History of the Kerala School of Hindu Astronomy (in Perspective) c8.s3.5

c8.s3.5

‘Multiply the difference of the last and the current sine differences by the two parts of the elemental arc (made by any intermediary point on it) and divide by the square of the elemental arc and further multiply by three. Now divide the result so obtained by four in the first rāśi, or by six in the second rāśi. The final result thus obtained should be added to the portion of the current sine difference (got by linear proportion).