Reference angles are essential for understanding trigonometric functions and solving various math problems in geometry, physics, and engineering. In this article, we’ll discuss what reference angles ...

To solve problems involving non-right-angled triangles, the correct rule must first be chosen. The cosine rule can be used in any triangle to calculate: a side when two sides and the angle in between ...

Let's remind ourselves of what the sine graph looks like so that we can see how many solutions we should be expecting: Therefore, from the graph of the function, we can see that we should be expecting ...