These programs illustrate trigonometric functions in a clear and dynamic format that makes full use of the advantages of computer animation. Methods of solving right-angled triangles, using the sine, cosine, and tangent ratios, are presented. The sine and cosine laws are then developed, and several examples involving oblique triangles are introduced and solved. The series ends with the application of the sine and cosine laws to some real-world situations. 6-part series, 10 minutes each.