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一、内容和内容解析三角函数是基本初等函数,它是描述周期现象的重要数学模型。角的概念的推广正是这一思想的体现之一,是初中相关知识的自然延续,为进一步研究角的和、差、倍、半关系提供了条件,也为今后学习向量、解析几何、复数等相关知识提供了有利的工具。二、目标和目标解析1.结合实例体验角的概念推广的必要性;从运动的观点出发,进行角的概念推广,理解并掌握正角、负角、零角的定义。2.能建立适当的坐标系来讨论任意角,理解象限角、轴线角的概
First, the content and content analysis Trigonometric function is a basic elementary function, it is an important mathematical model to describe the phenomenon of the cycle. The promotion of the concept of angle is one of the manifestations of this idea. It is a natural continuation of junior high school-related knowledge and provides the conditions for further study of the sum, difference, fold and semi-relation of angles. It also provides conditions for learning vectors, analytic geometry, complex numbers And other related knowledge provides a useful tool. Second, the target and target analysis 1. Combination of the necessity of the concept of the experience angle of the case; from the viewpoint of the movement, the angle of the concept of promotion, understanding and master the definition of positive angle, negative angle, zero angle. 2. Can establish the appropriate coordinate system to discuss any angle, understand the quadrant angle, axis angle summary