[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.s3.90 # Mathematics in Ancient and Medieval India c8.s3.90 Mathematics in Ancient and Medieval India c8.s3.90 - **Language:** English ### [c8.s3.90](https://indike.org/pramana/ins.science.bag-1979.c8.s3.90) Assuming all the sine chords to be equal to the corresponding arc and dx to be equal to one unit, then the approximate value of \*utkramajyā\* = \[ 1 + 2 + 3 + + (x-1) + x \]1/R = 1/R\[ x + (x-1) + + 2 + 1 \] = (x²)/2 · 1/R = (x²)/2R (2) - [Previous: c8.s3.89](https://indike.org/pramana/ins.science.bag-1979.c8.s3.89) - [Next: c8.s3.91](https://indike.org/pramana/ins.science.bag-1979.c8.s3.91) - [Up: c8.s3](https://indike.org/pramana/ins.science.bag-1979.c8.s3) --- Source: [https://indike.org/pramana/ins.science.bag-1979.c8.s3.90](https://indike.org/pramana/ins.science.bag-1979.c8.s3.90) · Pramāṇa