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1问题的提出求空间中的角,是高考数学理科卷考查的重点,多设置在立体几何大题的后几问。由于空间向量的引入,求空间角的方法有综合法和坐标法(实为坐标向量法)两种。至于纯向量法,无论是在实际教学中,还是从高考阅卷的反馈看,很少有学生选择,故不做重点讨论。显然,综合法和坐标法的考查功能是有显著差异的。因此,在命制相关试题时,自然会有下列一些选择:是有利于综合法,还是有利于坐标法,或两者兼顾,这就形成了试题的不同风格。另外,要让学生对两种方法的运用都能得心应手,关键在于如何突
A question asked to find space in the corner, is the college entrance examination mathematical science test focus, and more set in the three-dimensional geometry of the later asked. Due to the introduction of space vector, there are two ways to find the space angle: synthesis method and coordinate method (actually, coordinate vector method). As for the pure vector method, no matter in actual teaching or feedback from the entrance examination, there are very few students to choose, so it will not be discussed in great detail. Obviously, there is a significant difference between the comprehensive method and the coordinate method. Therefore, in the life-related questions, there will naturally be the following options: Is conducive to comprehensive law, or coordinate method, or a combination of both, which formed a different style of questions. In addition, to enable students to use both methods can be handy, the key is how to sudden