Visual and interactive way to thorough understanding and mastering Trigonometry without getting wearied on the very first chapter! Java- and web-based math course includes theoretical concepts, hands-on examples featuring animated graphics and live formulas, problem-solving lessons, and customizable real time tests with solutions and evaluations. Topics covered: angles and their measure, trigonometric functions, identities and equations, transformations of trigonometric graphs, inverse trigonometric functions, solving triangles, polar coordinate system, vectors in the plane, complex numbers. The demo version contains selected lessons from the full version, fully functional, all features included.