[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) › c8.59 # Mathematics in Ancient and Medieval India c8.59 Mathematics in Ancient and Medieval India c8.59 - **Language:** English ### [c8.59](https://indike.org/pramana/ins.science.bag-1979.c8.59) Lalla (c. 768 A. D.) gave the following rules about the relationship of trigonometrical functions : - [Previous: c8.58](https://indike.org/pramana/ins.science.bag-1979.c8.58) - [Next: c8.60](https://indike.org/pramana/ins.science.bag-1979.c8.60) - [Up: c8](https://indike.org/pramana/ins.science.bag-1979.c8) --- Source: [https://indike.org/pramana/ins.science.bag-1979.c8.59](https://indike.org/pramana/ins.science.bag-1979.c8.59) · Pramāṇa