Jyotiṣa-śāstra Saṅgraha: Threefold Division, Gaṇita Methods, Muhūrta, and Planetary Reckoning
त्रिज्याभ्यस्तं भुजफलं मकरादौ धनं स्मृतम् । संशोध्यं तु त्रिजीवायां कर्कादौ कोटिजं फलम् ॥ १०९ ॥
trijyābhyastaṃ bhujaphalaṃ makarādau dhanaṃ smṛtam | saṃśodhyaṃ tu trijīvāyāṃ karkādau koṭijaṃ phalam || 109 ||
Das Ergebnis der bhujā (Sinus), mit der trijyā (Radius) multipliziert, heißt „dhana“, wenn der Bogen/das Zeichen bei Makara (Steinbock) beginnt. Nach der nötigen Korrektur in Bezug auf den Radius wird es jedoch von Karka (Krebs) an zum Ergebnis der koṭi (Kosinus).
Sanatkumara (teaching Narada in a technical/śāstra context)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: adbhuta
It shows that the Purana preserves śāstric precision alongside dharma—accurate Jyotiṣa/gaṇita supports correct timing and understanding of sacred duties, which in turn aids disciplined living oriented toward mokṣa.
Indirectly: by grounding religious life in accurate computation (for calendrical and astronomical determinations), it safeguards proper observance of vrata and worship schedules that support steady Vishnu-bhakti in practice.
Jyotiṣa (Vedāṅga) with gaṇita: the relationship between jīvā/bhujā (sine), koṭi (cosine), and trijyā (radius), including sign/quarter-based usage from Makara and Karka.