BRAHMAGUPTA' ASTRONOMY: ITS HIGHLIGHTS Also MBh. IV. 1; SuSi. II. 29; SiDVy I. ii. 10: Sise. iii. 12; Sisi. I. ii. 18-19 (i). 308 25. Rule for finding the RSine (Reversed sine) of an arc (<90°): BrSpSi II. 10. Also SuSi. II. 31-32; MBh. IV. 3-14: LBh. II, 2 (11)-3 (i): SiDVy. I. ii. 12; Sise. III. 15; Sisi. I. ii. 10 (ii)-11. (We shall discuss it separately in the light of Brahmagupta formula.) 26. Rule for finding the Sun's equation of the centre: BrSpSi.. II. 15 (ii); Also MBh. IV. 4 (ii); . III SiSe. 27 27. Rule for determining the Sun's true longitude: BrSpSi. XIV. 17-18. Also MBh. IV. 21-23; Sise. III. 52. 28. Rule for finding the Sun's bhujantara correction under the eccentric theory: BrSpSi. XIV. 19. Also MBh-IV. 24. 29. Rule for determining the cara-samskara or cara correction : KK. I. 22. 30. Rule for finding the semi-durations of the day and night BrSpSi. II. 60; KK. I. 23. Also SuSi. II. 62-63; SiDV, I. ii. 20-21, SiSe. III. 70; Sisi. I. ii. 52. 31. Rule for calculating the tithi BrSpSi, II. 62; KK. I. 25. Also SaSi. II. 66; SiDVy I. ii. 22; Sise. III. 71; Sisi. I. ii. 66. 32. Rule for calculating the Karana: KK. I. 27. Also. SiDVr. I. ii. 24; SiSe. III. 77; SiSi. I. ii. 66. 33. Rule for calculating naksatra: BrSpSi. II. 62; KK. I. 24. Also SuSi. II. 64; SiDVr. I. ii. 23 (1); SiSe. III. 75; SiSi. I. ii. 67. 34. Rule pertaining to direct and retrograde motions of a planet: BrSpSi. II. 50-51.
