[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) › c8.113 # Mathematics in Ancient and Medieval India c8.113 Mathematics in Ancient and Medieval India c8.113 - **Language:** English ### [c8.113](https://indike.org/pramana/ins.science.bag-1979.c8.113) ¹ Sin 2 A = 2 Sin A Cos A (ch. 3, v. 73); Sin 3 A = 3 Sin A – 4 Sin³A (ch. 3, v. 74); Sin (A±B) = Sin A Cos B±Cos A Sin B (ch. 3, v. 68); Cos (A±B) = Cos A Cos BSin A Sin B (ch. 3, v. 69); etc. \[in modern equivalents.\] - [Previous: c8.112](https://indike.org/pramana/ins.science.bag-1979.c8.112) - [Next: c8.114](https://indike.org/pramana/ins.science.bag-1979.c8.114) - [Up: c8](https://indike.org/pramana/ins.science.bag-1979.c8) --- Source: [https://indike.org/pramana/ins.science.bag-1979.c8.113](https://indike.org/pramana/ins.science.bag-1979.c8.113) · Pramāṇa