如图,在矩形ABCD中,AB=1,BC=根号3,此矩形沿地面上一直线滚动,在活动过程中始终与地面垂直,设直线BC与地面所成的角为k,矩形周边上最高点离地面的距离为f(k).求: (1)k的取值范围; (2)函数f(k)的
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![如图,在矩形ABCD中,AB=1,BC=根号3,此矩形沿地面上一直线滚动,在活动过程中始终与地面垂直,设直线BC与地面所成的角为k,矩形周边上最高点离地面的距离为f(k).求: (1)k的取值范围; (2)函数f(k)的](/uploads/image/z/4040628-60-8.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E7%9F%A9%E5%BD%A2ABCD%E4%B8%AD%2CAB%3D1%2CBC%3D%E6%A0%B9%E5%8F%B73%2C%E6%AD%A4%E7%9F%A9%E5%BD%A2%E6%B2%BF%E5%9C%B0%E9%9D%A2%E4%B8%8A%E4%B8%80%E7%9B%B4%E7%BA%BF%E6%BB%9A%E5%8A%A8%2C%E5%9C%A8%E6%B4%BB%E5%8A%A8%E8%BF%87%E7%A8%8B%E4%B8%AD%E5%A7%8B%E7%BB%88%E4%B8%8E%E5%9C%B0%E9%9D%A2%E5%9E%82%E7%9B%B4%2C%E8%AE%BE%E7%9B%B4%E7%BA%BFBC%E4%B8%8E%E5%9C%B0%E9%9D%A2%E6%89%80%E6%88%90%E7%9A%84%E8%A7%92%E4%B8%BAk%2C%E7%9F%A9%E5%BD%A2%E5%91%A8%E8%BE%B9%E4%B8%8A%E6%9C%80%E9%AB%98%E7%82%B9%E7%A6%BB%E5%9C%B0%E9%9D%A2%E7%9A%84%E8%B7%9D%E7%A6%BB%E4%B8%BAf%28k%29.%E6%B1%82%3A+%281%29k%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%EF%BC%9B+%282%29%E5%87%BD%E6%95%B0f%28k%29%E7%9A%84)
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