Mathematicians had long thought that using trigonometry to prove the theorem was unworkable, given that the fundamental ...

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 ...

An understanding of the three trigonometric ratios and how to change the subject of a formula is essential. The Greek letter, Ɵ (theta) is often used as a symbol for an unknown angle. For a right ...