关于极坐标系中曲线的交点张文忠（四川工业学院６１１７４４）两条直角坐标系中曲线的交点，总能通过联立方程的解求得．而对于两条极坐标系中的曲线，解联立方程却不一定能求得所有的交点，这常易使一些学生感到困惑．下面举图１几个这方面的例子．例１求下面两条极坐标... About the point of intersection of the curve in polar coordinate system Zhang Wenzhong (Sichuan University of Technology, 611744) The intersection point of the curves in two orthogonal coordinate systems can always be obtained through the solution of simultaneous equations. For the curves in the two polar coordinate systems, the solution simultaneous equations may not necessarily obtain all the intersections, which often makes some students confused. Here are some examples of this in Figure 1. Example 1 Find the following two polar coordinates...