13 March 2020 Sergiu Funieru The formula for sin 3a [formula for the sine of triple angle] 0 The formula for sin 3a [formula for the sine of triple angle] Have you seen this? 0
![The formula for sin 3a [formula for the sine of triple angle]](https://lunlun.com/wp-content/uploads/2020/03/The-formula-for-sin-3a-formula-for-the-sine-of-triple-angle.png "The formula for sin 3a [formula for the sine of triple angle]")