正三棱柱ABC-A1B1C1的底面边长为8,对角线B1Cc=10,D为AC的中点求二面角C-DB-C1的大小的余弦值 求直线AB1与平面BB1C1C所成角的正弦值 求异面直线AB1与BC1所成角的余弦值
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 21:08:23
![正三棱柱ABC-A1B1C1的底面边长为8,对角线B1Cc=10,D为AC的中点求二面角C-DB-C1的大小的余弦值 求直线AB1与平面BB1C1C所成角的正弦值 求异面直线AB1与BC1所成角的余弦值](/uploads/image/z/13636248-24-8.jpg?t=%E6%AD%A3%E4%B8%89%E6%A3%B1%E6%9F%B1ABC-A1B1C1%E7%9A%84%E5%BA%95%E9%9D%A2%E8%BE%B9%E9%95%BF%E4%B8%BA8%2C%E5%AF%B9%E8%A7%92%E7%BA%BFB1Cc%3D10%2CD%E4%B8%BAAC%E7%9A%84%E4%B8%AD%E7%82%B9%E6%B1%82%E4%BA%8C%E9%9D%A2%E8%A7%92C-DB-C1%E7%9A%84%E5%A4%A7%E5%B0%8F%E7%9A%84%E4%BD%99%E5%BC%A6%E5%80%BC+%E6%B1%82%E7%9B%B4%E7%BA%BFAB1%E4%B8%8E%E5%B9%B3%E9%9D%A2BB1C1C%E6%89%80%E6%88%90%E8%A7%92%E7%9A%84%E6%AD%A3%E5%BC%A6%E5%80%BC+%E6%B1%82%E5%BC%82%E9%9D%A2%E7%9B%B4%E7%BA%BFAB1%E4%B8%8EBC1%E6%89%80%E6%88%90%E8%A7%92%E7%9A%84%E4%BD%99%E5%BC%A6%E5%80%BC)
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