如图,在等腰三角形ABC中,AB=AC=10cm,∠ABC=30°,以BC所在直线为x轴,以BC边上的高所在的直线为y轴建立平面直角坐标系.(1)求直线AC的解析式;(2)有一动点P以1cm/s的速度从点B开始沿x轴向其正
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![如图,在等腰三角形ABC中,AB=AC=10cm,∠ABC=30°,以BC所在直线为x轴,以BC边上的高所在的直线为y轴建立平面直角坐标系.(1)求直线AC的解析式;(2)有一动点P以1cm/s的速度从点B开始沿x轴向其正](/uploads/image/z/1573191-63-1.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E7%AD%89%E8%85%B0%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%2CAB%3DAC%3D10cm%2C%E2%88%A0ABC%3D30%C2%B0%2C%E4%BB%A5BC%E6%89%80%E5%9C%A8%E7%9B%B4%E7%BA%BF%E4%B8%BAx%E8%BD%B4%2C%E4%BB%A5BC%E8%BE%B9%E4%B8%8A%E7%9A%84%E9%AB%98%E6%89%80%E5%9C%A8%E7%9A%84%E7%9B%B4%E7%BA%BF%E4%B8%BAy%E8%BD%B4%E5%BB%BA%E7%AB%8B%E5%B9%B3%E9%9D%A2%E7%9B%B4%E8%A7%92%E5%9D%90%E6%A0%87%E7%B3%BB%EF%BC%8E%EF%BC%881%EF%BC%89%E6%B1%82%E7%9B%B4%E7%BA%BFAC%E7%9A%84%E8%A7%A3%E6%9E%90%E5%BC%8F%EF%BC%9B%EF%BC%882%EF%BC%89%E6%9C%89%E4%B8%80%E5%8A%A8%E7%82%B9P%E4%BB%A51cm%2Fs%E7%9A%84%E9%80%9F%E5%BA%A6%E4%BB%8E%E7%82%B9B%E5%BC%80%E5%A7%8B%E6%B2%BFx%E8%BD%B4%E5%90%91%E5%85%B6%E6%AD%A3)
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