Trigonometric Ratios

Drag the green points to change the lengths and the angle.
Adapted from [url=https://ggbm.at/Hp2X37NC]Alex Chik's applet[/url] in gMath 互動數學教室 [url=http://www.geogebra.hk]http://www.geogebra.hk[/url].
– Anthony OR 柯志明, Alex CHIK

Information: Trigonometric Ratios