[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) › c8.7 # Mathematics in Ancient and Medieval India c8.7 Mathematics in Ancient and Medieval India c8.7 - **Language:** English ### [c8.7](https://indike.org/pramana/ins.science.bag-1979.c8.7) ( 1 ) \*Trigonometical functions\* :—In India, like Babylon and Greece, the study of the properties of the right-angled triangle inscribed in a circle in connection with the use of gnomon in astronomical measurement was given much importance. The circle was divided into quadrants and circumference into many equal parts. Three functions² \*Jyā\*, \*Kojyā\* and \*Utkramajyā\* were used in the development of this new geometry, known as plane trigonometry. The modern equivalents of these functions (Fig. 18) are as follows :— - [Previous: c8.6](https://indike.org/pramana/ins.science.bag-1979.c8.6) - [Next: c8.8](https://indike.org/pramana/ins.science.bag-1979.c8.8) - [Up: c8](https://indike.org/pramana/ins.science.bag-1979.c8) --- Source: [https://indike.org/pramana/ins.science.bag-1979.c8.7](https://indike.org/pramana/ins.science.bag-1979.c8.7) · Pramāṇa