Complex numbers have applications in many applied sciences. This online text begins with an introduction to trigonometry, which serves as a starting point for additional discussion about complex numbers (also known as...

An introduction and a guide to trigonometry, with hints and answers to exercises, and Java applets as illustrations. Contents include applications of trigonometry, angle measurement, chords, sines, cosines, tangents and...

This activity, from the Real World Learning Objects Resource Library, helps students estimate the circumference of the earth by recreating "Eratosthenes' amazing experiment utilizing data generated from the...

This is an interactive site that explains the ideas behind trigonometry. It also offers hands on experience in working with triangles.

Shockwave whiteboard movies on algebra, geometry, probability, statistics, the mathematics of finance, and more. A whiteboard movie (WM) is a multimedia screen recording of writing on an electronic whiteboard (real or...