SURYA SIDDHANTA Brahmagupta's rule is I sin (!-N)
- ?g&a fika,*
R 4 B cos Z which is practically the same in form as that of the modern Sझrge Siddhanta, Again the rule in the modern Srya Siddhiruta for inding the parallax in latitude (+/-2) x d¢keepa 15 x R (y, 10) According to the Brihmasphur Siddhinta (V, 24, also xi, 23-24) (-स) B ein z' The == - same 1 x R Here ' and . are the appa¥ent daily motions of the moon and the sun, Z’ the Zenith distance of the nonagesimal; drikaapa and the + sine ' of the zenith distance of the nonagesimal are taken as identical. Here the modern Sirya Siddharta has given Up the rulos of Aryabhata I, which bring in the radius of the earth and the distance of the planet in the equatio0B, and calculating the parallaxes in longitude and latitude separately for the sun and the moon, and which have been branded by Brahma gupta as tedious. Hence the opinion of Nithyjnanda that the modern Sirya Siddhiint was composed at 3,600 of the Kali years elapsed and bhat of Muni£vara that it was wrizfen by Aryabhata I himself are not tenable (i) Then again Abruni has said in his India that the surga Siddhinta was composed by Latadeva. We now know that Lta, the expoundet of the Monरैalka and the Palika Sadhdinto according to Varahamihira, was a direct pupil of
- Brahmasphuta Siddhanta, v, 4-5.
- AIberinf's India, Translation by Buchnu, Vol. IT, p. 158,