Surya Siddhanta
मध्यज्यादिग्वशात् सा च विज्ञेया दक्षिणोत्तरा । सेन्दुविक्षेपदिक्साम्ये युक्ता विश्लेषितान्यथा॥
The amount of the parallax in latitude (just found) is south or north according as the nonagesimal is south or north (of the zenith). Add this amount to the Moon's latitude if they are of the same name, but if of contrary names, subtract it. (The result is the apparent latitude of the Moon). [In this, if we take for convenience's sake sin d {\displaystyle \sin d} for sin d + x {\displaystyle \sin d+x} and R . {\displaystyle R.} for cos ( l ± y ) {\displaystyle \cos(l\pm y)} on account of the smallness of x {\displaystyle x}, y {\displaystyle y} and l {\displaystyle l} in an eclipse, then we have x = p sin a . sin d R 2 {\displaystyle x=p{\frac {\sin a.\sin d}{R^{2}}}} Now, it is evident that if p {\displaystyle p} be assumed, the horizontal parallax of the Moon from the Sun in time (or p {\displaystyle p} = 4 Ghaṭikás) x {\displaystyle x} will be the Moon's parallax in longitude from the Sun, and then x = 4 sin a sin d R 2 = sin d ( 1 2 R 2 ) sin . a = sin d c h h e d a {\displaystyle x={\frac {4\sin {a}\sin {d}}{R^{2}}}={\frac {\sin {d}}{\frac {\left({\frac {1}{2}}R^{2}\right)}{\sin .a}}}={\frac {\sin {d}}{chheda}}}. B.D.]
english translation
madhyajyAdigvazAt sA ca vijJeyA dakSiNottarA । senduvikSepadiksAmye yuktA vizleSitAnyathA॥
hk transliteration by Sanscript