课题:§3弧度制教材分析在物理学和日常生活中,一个量常常需要用不同的方法进行度量,不同的度量方法可以满足我们不同的需要。现实生活中有许多计量单位,如度量长度可以用米、厘米、尺、码等不同的单位制,度量重量可以用千克、克、斤、吨等不同的单位制,度量角的大小可以用度为单位进行度量。通过类比引出弧度制,给出1弧度的定义,使学生建立弧度的概念,理解弧度制的定义,达到突破难点之目的。通 Subjects: §3 radian textbook analysis In physics and daily life, an amount often need to use different methods to measure, different measurement methods to meet our different needs. There are many units of measurement in real life, such as measuring the length of the unit system can be used meters, centimeters, feet, yards, etc., can be used to measure the weight of kilograms, grams, pounds, tons of different unit system, measure the size of the angle can be used Measure for the unit. Through the analogy leads to the radian system, gives the definition of 1 radian, so that the students to establish the concept of radian, understand the definition of radian system, to achieve the purpose of breaking through difficulties. through