Trigonometric Ratios of Special Angles

This GeoGebra applet visualizes sine, cosine and tangent ratios for 30°, 45° and 60° angles using right triangles. Core concepts include trigonometric definitions, special-angle ratio patterns and triangle similarity. Construction employs Point, Polygon, Segment, Angle, Midpoint and Intersect commands to create polygons, angle labels and altitude segments, with If/Join for dynamic value display. Suitable for middle-school to high-school trigonometry lessons and self-study.