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高中数学重视数学知识的发生、发展和应用的过程.圆的参数方程这一内容,在高中数学作为选修部分出现,在高考中的直接分量不多,故在平时教学中要求较低.但在高三复习时,在解决与圆相关的某些问题时,巧用圆的参数方程,常能化繁为简,化难为易,收到事半功倍的效果.下面举例说明.一、求与圆有关的最值问题例1若实数x,y满足(x-2)2+y2=3.求:(1)的最y/x
High school mathematics emphasizes the process of the occurrence, development and application of mathematical knowledge.The round parametric equation, which appears in high school math as an elective part, has few direct components in the college entrance examination, so it is less demanding in normal teaching Senior high school review, in solving some problems associated with the circle, the clever use of the circle of parametric equations, often can be complicated, simplification is easy, received a multiplier effect. The following examples. First, seek and circle-related If the real number x, y satisfy (x-2) 2 + y2 = 3. Find the most y / x of (1)