[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Science, technology and education](https://indike.org/pramana/ins.science) › [Mathematics in Ancient and Medieval India](https://indike.org/pramana/ins.science.bag-1979) › c9.55 # Mathematics in Ancient and Medieval India c9.55 Mathematics in Ancient and Medieval India c9.55 - **Language:** English ### [c9.55](https://indike.org/pramana/ins.science.bag-1979.c9.55) Now Bhāskara II's method of finding the \*ayanavalana\* leads to the differentiation of this equation (1) giving \*ayana-valana\* to be R (dδ)/dl = (R cos l . R sin ω)/(R cos δ) ( ω = obliquity of the ecliptic ) - [Previous: c9.54](https://indike.org/pramana/ins.science.bag-1979.c9.54) - [Next: c9.56](https://indike.org/pramana/ins.science.bag-1979.c9.56) - [Up: c9](https://indike.org/pramana/ins.science.bag-1979.c9) --- Source: [https://indike.org/pramana/ins.science.bag-1979.c9.55](https://indike.org/pramana/ins.science.bag-1979.c9.55) · Pramāṇa