Surya Siddhanta
स्वकर्णाप्ता धनुर्लिप्ता नतास् ता दक्षिणे भुजे। उत्तराश् चोत्तरे याम्यास् ताः सूर्यक्रान्तिलिप्तिकाः॥
- the zenith distance, found from that sine in minutes, is north or south according as the Bhuja is south or north respectively (at a given place). Find the sum of the zenith distance and the Sun's declination in minutes when they are both of the same name, but when they are of contrary names, find the difierence between them. This sum or difference is the latitude in minutes (at the given place).
english translation
svakarNAptA dhanurliptA natAs tA dakSiNe bhuje। uttarAz cottare yAmyAs tAH sUryakrAntiliptikAH॥
hk transliteration by Sanscript