18 March 2020 Sergiu Funieru The formula for tan (a + b) [formula for the tangent of sum] +1 The formula for tan (a + b) [formula for the tangent of sum] Have you seen this? +1
![The formula for tan (a + b) [formula for the tangent of sum]](https://lunlun.com/wp-content/uploads/2020/03/The-formula-for-tan-a-b-formula-for-the-tangent-of-sum.png "The formula for tan (a + b) [formula for the tangent of sum]")