A History of the Kerala School of Hindu Astronomy (in Perspective) c8.s4.19

c8.s4.19

'Multiply repeatedly the unit measurement, (which is the radius), by the square of the arc and divide by the square of the even numbers (2, 4 etc.) decreased by that number and then multiplied by the square of the radius; the first is, however, to be divided by twice the radius. Place the results one below the other and subtract each from the one above it. (This is the method) to derive the *śara-s* (tabular versines of the arc) which are collected (and stated, in order in the mnemonic verse) beginning with the expression *stena* (i.e., 0° 0′ 0″ 6″′).¹