圆O的直径AB=2,弦AC的长为√3,∴∠BAC=30°,弦AD的长为√2,∴∠BAD=45°.当AC,AD在AB的同侧时∠CAD=15°,CD^2=(2sin15°)^2=2(1-cos30°)=2-√3.当AC,AD在AB的异侧时∠CAD=75°,CD^2=(2sin75°)^2=2(1-cos150°)=2+...