用传统的综合推理法解立体几何问题时技巧性较强,一旦思路受阻就只能放弃.新课程增加的空间向量为解决这些问题提供了通用通法,其显著优点是减弱了推理论证的成份,用计算来代替论证,下面我们介绍用向量坐标运算解决立体几何中角的问题的通法.(Ⅰ)求异面直线所成的角设异面直线 The traditional comprehensive reasoning method to solve the three-dimensional geometry problem is more skillful, once the thinking is obstructed, we can only give up.The new space vector added to solve these problems provides a common method, which has the obvious advantage of weakening the reasoning argument , The calculation to replace the argument, the following we introduce vector coordinate operation to solve the problem of solid geometry corner of the general method (I)