Mathematics
Senior High
Resolved
請問第二題怎麼寫
(1)∠C。
(2) △ABC之外接圓面積。
Sints = SinB
在△ABC中,已知BC = 1,sin A <sin B,且sin 4與sinB為8x²-4/3x+
1=0的兩根,求△ABC的外接圓半徑。
3. 如圖,ABCD 為圓內接四邊形:若<DBC=30°,∠ABD=45°,CD=4,
求4D長。
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