向量是新教材中增加的教学内容,有关向量的概念、公式较多,学生在应用时往往思路不清、不得要领而舍简求繁.其实向量的应用题绝大部分集中在求长度、角度,证平行(含共线)、垂直4种类型上,如果能够建立直角坐标系,则平面上任意向量都可以用坐标表示,即a=xi+yj=(x,y),就能把几何 Vectors are the new teaching materials added in the new textbooks. There are many concepts and formulae about vectors. When students are applying, they often have unclear ideas and have no choice but to ask for simplicity. In fact, most of the applications of vectors are focused on length and angle. , proof parallel (including collinear), vertical four types, if you can establish a rectangular coordinate system, any vector on the plane can be expressed by coordinates, that is, a = xi + yj = (x, y), you can put the geometry