[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.s3.72 # Mathematics in Ancient and Medieval India c8.s3.72 Mathematics in Ancient and Medieval India c8.s3.72 - **Language:** English ### [c8.s3.72](https://indike.org/pramana/ins.science.bag-1979.c8.s3.72) $or s = r \[ (r sin θ)/(r cos θ) - ⅓ ( (r sin θ)/(r cos θ) )³ + ⅕ ( (r sin θ)/(r cos θ) )⁵ - \]$ Hence, θ = tan θ - ⅓ tan ³ θ + ⅕ an⁵ θ - when s = r θ - [Previous: c8.s3.71](https://indike.org/pramana/ins.science.bag-1979.c8.s3.71) - [Next: c8.s3.73](https://indike.org/pramana/ins.science.bag-1979.c8.s3.73) - [Up: c8.s3](https://indike.org/pramana/ins.science.bag-1979.c8.s3) --- Source: [https://indike.org/pramana/ins.science.bag-1979.c8.s3.72](https://indike.org/pramana/ins.science.bag-1979.c8.s3.72) · Pramāṇa