12 March 2020 Sergiu Funieru The formula for sin 2a [formula for the sine of double angle] 0 The formula for sin 2a [formula for the sine of double angle] Have you seen this? 0
![The formula for sin 2a [formula for the sine of double angle]](https://lunlun.com/wp-content/uploads/2020/03/The-formula-for-sin-2a-formula-for-the-sine-of-double-angle.png "The formula for sin 2a [formula for the sine of double angle]")