To a nonmathematician, having the letter “i” represent a number that does not quite exist and is “imaginary” can be hard to ...

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 ...

Let’s look at how to use trigonometric identities to calculate missing sides ... we can calculate all the other measurements for the shape. We get this value by pressing 15, then the × ...