Here is the new description with all the links and additional text removed: Learn how to solve equations using the angles sum ...

👉 Learn how to solve equations using half-angle identities. To do this we will replace every trig function with half angles ...

Solve \(\sqrt 3 \cos x + \sin x = \sqrt 2\), for \(0 \le x \le 2\pi\). First of all we need to put \(\sqrt 3 \cos x + \sin x\) into the form \(k\cos (x - \alpha ...