From firefighters using ladders in emergency situations to a young water skier preparing for a competition, real-life scenarios highlight the importance of trigonometry in solving everyday problems. This visually engaging program concentrates on the sine ratio and its applications, visualizing for students how the relationships between sides and angles in right triangles is important. In The Sine Ratio, clear views of real objects, along with helpful graphics and careful explanations, demonstrate how the necessary information is selected and used. A Teacher's Guide is included. .