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学习了直线与圆的位置关系,常会遇到证明一条直线是圆的切线的题目,如何证明一条直线是圆的切线,一般会出现以下三种情况.
Learning the relationship between the line and the circle, often encounter the problem of proving a straight line is a tangent of the circle, how to prove a straight line is a tangent of the circle, there will usually be the following three cases.