[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) › c8.215 # Mathematics in Ancient and Medieval India c8.215 Mathematics in Ancient and Medieval India c8.215 - **Language:** English ### [c8.215](https://indike.org/pramana/ins.science.bag-1979.c8.215) It must be noted that the formula (3) readily follows from (2) if we substitute the angle A/2 by A. Reverse result follows if we substitute A for 2 A. It is Varāhamihira¹ who first gave the values of \*Jyā\* 30°, \*Jyā\* 45°, \*Jyā\* 60°, \*Jyā\* 90° and formulae (1) and (3). So it will not be far from truth to state that Varāhamihira ( 505 A. D. ) and possibly other scholars of his time prepared their sine table using these formulae and the values of the \*Jyās\* mentioned above. - [Previous: c8.214](https://indike.org/pramana/ins.science.bag-1979.c8.214) - [Next: c8.216](https://indike.org/pramana/ins.science.bag-1979.c8.216) - [Up: c8](https://indike.org/pramana/ins.science.bag-1979.c8) --- Source: [https://indike.org/pramana/ins.science.bag-1979.c8.215](https://indike.org/pramana/ins.science.bag-1979.c8.215) · Pramāṇa