在ΔABC中,A,B为锐角,A,B,C所对的边分别为a,b,c且cos2A=3/5,sinB=根号10/10⑴求A+B值⑵若a-b=...在ΔABC中,A,B为锐角,A,B,C所对的边分别为a,b,c且cos2A=3/5,sinB=根号10/10⑴求A+B值⑵若a-b=根号2-1,
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![在ΔABC中,A,B为锐角,A,B,C所对的边分别为a,b,c且cos2A=3/5,sinB=根号10/10⑴求A+B值⑵若a-b=...在ΔABC中,A,B为锐角,A,B,C所对的边分别为a,b,c且cos2A=3/5,sinB=根号10/10⑴求A+B值⑵若a-b=根号2-1,](/uploads/image/z/1693294-70-4.jpg?t=%E5%9C%A8%CE%94ABC%E4%B8%AD%2CA%2CB%E4%B8%BA%E9%94%90%E8%A7%92%2CA%2CB%2CC%E6%89%80%E5%AF%B9%E7%9A%84%E8%BE%B9%E5%88%86%E5%88%AB%E4%B8%BAa%2Cb%2Cc%E4%B8%94cos2A%EF%BC%9D3%2F5%2CsinB%EF%BC%9D%E6%A0%B9%E5%8F%B710%2F10%E2%91%B4%E6%B1%82A%EF%BC%8BB%E5%80%BC%E2%91%B5%E8%8B%A5a%EF%BC%8Db%EF%BC%9D...%E5%9C%A8%CE%94ABC%E4%B8%AD%2CA%2CB%E4%B8%BA%E9%94%90%E8%A7%92%2CA%2CB%2CC%E6%89%80%E5%AF%B9%E7%9A%84%E8%BE%B9%E5%88%86%E5%88%AB%E4%B8%BAa%2Cb%2Cc%E4%B8%94cos2A%EF%BC%9D3%2F5%2CsinB%EF%BC%9D%E6%A0%B9%E5%8F%B710%2F10%E2%91%B4%E6%B1%82A%EF%BC%8BB%E5%80%BC%E2%91%B5%E8%8B%A5a%EF%BC%8Db%EF%BC%9D%E6%A0%B9%E5%8F%B72%EF%BC%8D1%2C)
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