(1)在Rt三角形ABC中,CD为斜边AB上的高,若AD=2,DB=8,求tanA的值和AC,BC的长。(2)在Rt三角形ABC中,角C=90度,CD垂直AB于点D,AC=3,BC=4,则tan角ACD=?(3)在等腰三角形ABC中,AB=AC,如果AB=2BC,求t
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![(1)在Rt三角形ABC中,CD为斜边AB上的高,若AD=2,DB=8,求tanA的值和AC,BC的长。(2)在Rt三角形ABC中,角C=90度,CD垂直AB于点D,AC=3,BC=4,则tan角ACD=?(3)在等腰三角形ABC中,AB=AC,如果AB=2BC,求t](/uploads/image/z/12974184-0-4.jpg?t=%EF%BC%881%EF%BC%89%E5%9C%A8Rt%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%EF%BC%8CCD%E4%B8%BA%E6%96%9C%E8%BE%B9AB%E4%B8%8A%E7%9A%84%E9%AB%98%EF%BC%8C%E8%8B%A5AD%3D2%EF%BC%8CDB%3D8%EF%BC%8C%E6%B1%82tanA%E7%9A%84%E5%80%BC%E5%92%8CAC%2CBC%E7%9A%84%E9%95%BF%E3%80%82%EF%BC%882%EF%BC%89%E5%9C%A8Rt%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%2C%E8%A7%92C%3D90%E5%BA%A6%EF%BC%8CCD%E5%9E%82%E7%9B%B4AB%E4%BA%8E%E7%82%B9D%EF%BC%8CAC%3D3%EF%BC%8CBC%3D4%EF%BC%8C%E5%88%99tan%E8%A7%92ACD%3D%EF%BC%9F%EF%BC%883%EF%BC%89%E5%9C%A8%E7%AD%89%E8%85%B0%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%EF%BC%8CAB%3DAC%2C%E5%A6%82%E6%9E%9CAB%3D2BC%2C%E6%B1%82t)
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