Surya Siddhanta
ओजयुग्मान्तरगुणा भुजज्या त्रिज्ययोद्धृता ।*युग्मे वृत्ते धनर्णम् स्याद् ओजाद् ऊनाधिके स्फुटम् ॥ (C युग्मवृत्ते)
Take the difference between the peripheries of epicycles of a planet at the ends of an even and an odd quadrant; multiply it by the sine of the Bhuja (of the given Kendra of the planet,) and divide the product by the radius. Add or subtract the quotient to or from the periphery which is at the end of an even quadrant according as it is less or greater than that which is at the end of an odd quadrant: the result will be the Sphuṭa or rectified periphery (of the epicycle of the planet.)
english translation
ojayugmAntaraguNA bhujajyA trijyayoddhRtA ।*yugme vRtte dhanarNam syAd ojAd UnAdhike sphuTam ॥ (C yugmavRtte)
hk transliteration by Sanscript