Surya Siddhanta
स्वेष्टकर्णहता भक्ता त्रिज्ययाग्राङ्गुलादिका । त्रिज्यावर्गार्धतो +अग्रज्यावर्गोनाद् द्वादशाहतात् ॥
Subtract the square of the sine of amplitude from the half of the square of the radius; multiply circle of which the azimuth remainder by 144: . -
english translation
sveSTakarNahatA bhaktA trijyayAgrAGgulAdikA । trijyAvargArdhato +agrajyAvargonAd dvAdazAhatAt ॥
hk transliteration by Sanscript