已知,直角梯形ABCD,AD平行BC,DC垂直BC,已知AB=5,BC=6.(本题10分)如图15:已知,直角梯形ABCD中,AD//BC,DC⊥BC,已知AB=5,BC=6,cosB= .点O为BC边上的一个点,连结OD,以O为圆心,BO为半径的⊙O分别交边AB于点P,
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![已知,直角梯形ABCD,AD平行BC,DC垂直BC,已知AB=5,BC=6.(本题10分)如图15:已知,直角梯形ABCD中,AD//BC,DC⊥BC,已知AB=5,BC=6,cosB= .点O为BC边上的一个点,连结OD,以O为圆心,BO为半径的⊙O分别交边AB于点P,](/uploads/image/z/2560525-61-5.jpg?t=%E5%B7%B2%E7%9F%A5%2C%E7%9B%B4%E8%A7%92%E6%A2%AF%E5%BD%A2ABCD%2CAD%E5%B9%B3%E8%A1%8CBC%2CDC%E5%9E%82%E7%9B%B4BC%2C%E5%B7%B2%E7%9F%A5AB%3D5%2CBC%3D6%EF%BC%8E%EF%BC%88%E6%9C%AC%E9%A2%9810%E5%88%86%EF%BC%89%E5%A6%82%E5%9B%BE15%EF%BC%9A%E5%B7%B2%E7%9F%A5%2C%E7%9B%B4%E8%A7%92%E6%A2%AF%E5%BD%A2ABCD%E4%B8%AD%2CAD%2F%2FBC%2CDC%E2%8A%A5BC%2C%E5%B7%B2%E7%9F%A5AB%3D5%2CBC%3D6%2CcosB%3D+%EF%BC%8E%E7%82%B9O%E4%B8%BABC%E8%BE%B9%E4%B8%8A%E7%9A%84%E4%B8%80%E4%B8%AA%E7%82%B9%2C%E8%BF%9E%E7%BB%93OD%2C%E4%BB%A5O%E4%B8%BA%E5%9C%86%E5%BF%83%2CBO%E4%B8%BA%E5%8D%8A%E5%BE%84%E7%9A%84%E2%8A%99O%E5%88%86%E5%88%AB%E4%BA%A4%E8%BE%B9AB%E4%BA%8E%E7%82%B9P%2C)
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