统编高一数学教材“三角函数图象”这一单元贯穿了集合和对应的观点,揭示概念比较深刻,这是新教材的优点。在教学实践中我们有两点体会。一、坐标轴的单位选取问题。就是在描绘三角函数图象时,两轴上的比例尺是相同呢,还是不同?新课本指出:“把X轴上从0到2π(这一段(长2π≈6.28)也分成12等 It is the advantage of the new textbook that the unit of “trigonometric function image” compiled by Gao Yi math textbooks runs through the collection and the corresponding viewpoint, revealing a rather profound concept. We have two experiences in teaching practice. First, the axis of the unit selection problem. Is the scale on both axes the same or different when depicting a trigonometric image? The new textbook states: "Dividing the X-axis from 0 to 2π (this length (2π≈6.28) into 12, etc.)