25 March 2020 Sergiu Funieru Formula for sin a x sin b [formula for the product of sines] +2 Formula for sin a x sin b [formula for the product of sines] Have you seen this? +2
![Formula for sin a x sin b [formula for the product of sines]](https://lunlun.com/wp-content/uploads/2020/03/Formula-for-sin-a-x-sin-b-formula-for-the-product-of-sines.png "Formula for sin a x sin b [formula for the product of sines]")