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纵观近几年全国各地的高考试卷,我们不难发现,对于立体几何的考查必不可少,其中求直线和平面所成的角的大小更是屡见不鲜。我们不妨从几个高考题着手,来探讨一下如何求斜线和平面所成角的大小。
Throughout the college entrance examination papers throughout the country in recent years, it is not difficult to find that for the three-dimensional geometry of the test is indispensable, where the straight line and the plane into the angle of the size is more common. We may wish to proceed from a few college entrance examination questions to explore how to find the diagonal and the plane by the angle of the size.