在圓O中,直徑AB=4,弦AC=2根號(hào)3.弦AD=根號(hào)2
在圓O中,直徑AB=4,弦AC=2根號(hào)3.弦AD=根號(hào)2
則弧CD的度數(shù)
則弧CD的度數(shù)
數(shù)學(xué)人氣：842 ℃時(shí)間：2019-12-08 03:18:15
優(yōu)質(zhì)解答
弦AC的所對(duì)圓心角A1=2*ARC SIN((AC/2)/(AB/2))=2*ARC SIN((2*3^0.5/2)/(4/2))=2*ARC SIN(3^0.5/2)=120度弦AD的所對(duì)圓心角A2=2*ARC SIN((AD/2)/(AB/2))=2*ARC SIN((2^0.5/2)/(4/2))=2*ARC SIN(2^0.5/4)=41.41度弧CD的...
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