如图,CA、CB为圆o的切线,切点分别为A、B.直径延长AD与CB的延长线交于点E.AB、CO交于点M,连接OB. (1)求证:角ABO=1/2角ACB (2)若sin角EAB=根号10/10,CB=12,求圆o的半径及BE/AE的值.
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![如图,CA、CB为圆o的切线,切点分别为A、B.直径延长AD与CB的延长线交于点E.AB、CO交于点M,连接OB. (1)求证:角ABO=1/2角ACB (2)若sin角EAB=根号10/10,CB=12,求圆o的半径及BE/AE的值.](/uploads/image/z/564318-54-8.jpg?t=%E5%A6%82%E5%9B%BE%2CCA%E3%80%81CB%E4%B8%BA%E5%9C%86o%E7%9A%84%E5%88%87%E7%BA%BF%2C%E5%88%87%E7%82%B9%E5%88%86%E5%88%AB%E4%B8%BAA%E3%80%81B.%E7%9B%B4%E5%BE%84%E5%BB%B6%E9%95%BFAD%E4%B8%8ECB%E7%9A%84%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%BA%A4%E4%BA%8E%E7%82%B9E.AB%E3%80%81CO%E4%BA%A4%E4%BA%8E%E7%82%B9M%2C%E8%BF%9E%E6%8E%A5OB.+%281%29%E6%B1%82%E8%AF%81%3A%E8%A7%92ABO%3D1%2F2%E8%A7%92ACB+%282%29%E8%8B%A5sin%E8%A7%92EAB%3D%E6%A0%B9%E5%8F%B710%2F10%2CCB%3D12%2C%E6%B1%82%E5%9C%86o%E7%9A%84%E5%8D%8A%E5%BE%84%E5%8F%8ABE%2FAE%E7%9A%84%E5%80%BC.)
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