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立体几何中的角和距离是立体几何的重点内容之一,同时也是高考的必考内容之一.在求异面直线所成的角或直线与平面所成的角时,如果能灵活应用公式cosθ=cosθ1cosθ2的
The angle and distance in the three-dimensional geometry is one of the key contents of the three-dimensional geometry, but also the college entrance examination will be one of the necessary content.When seeking the surface of a straight line or the angle formed by a straight line and the plane, if we can flexibly use the formula cos θ = cos θ1 cos θ2