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求直线与平面所成的角是高考考查的重点,我们必须熟练掌握求直线与平面所成的角.在求直线与平面所成的角时,应注意先判断直线与平面的位置关系.当直线与平面斜交时,关键是确定斜线上某点在直线或平面上的射影.最常用的方法就是利用面面垂直的性质定理,即寻找一个经过这点且与已
Finding the angle between the straight line and the plane is the focus of the college entrance examination. We must be skilled in grasping the angle between the straight line and the plane. When calculating the angle between the straight line and the plane, we should first determine the positional relationship between the straight line and the plane. When the straight line and the plane are skewed, the key is to determine the projection of a certain point on the line or plane on the diagonal line. The most common method is to use the vertical surface property theorem, that is, to find a point that has passed this point and has been