Some volcanic eruptions have been accurately predicted by looking at the complex sine waves created by small earthquakes within volcanoes. But what is a complex sine wave? Find out in this activity.

Mathematicians once turned up their noses at imaginary numbers. But complex analysis actually simplifies math and physics.

The trigonometric ratios sine, cosine and tangent are used to calculate angles and sides in right angled triangles. We are now going to extend trigonometry beyond right angled triangles and use it ...

Sine, cosine and tangent all have different positive or negative values depending on what quadrant they are in. Calculating the area of a triangle using trigonometry Trigonometry can be used to ...