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7.5空间向量求空间角(精练)(基础版)(原卷版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(基础版)(新高考地区专用)

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7.5空间向量求空间角(精练)(基础版)(原卷版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(基础版)(新高考地区专用)
7.5空间向量求空间角(精练)(基础版)(原卷版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(基础版)(新高考地区专用)
7.5空间向量求空间角(精练)(基础版)(原卷版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(基础版)(新高考地区专用)
7.5空间向量求空间角(精练)(基础版)(原卷版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(基础版)(新高考地区专用)
7.5空间向量求空间角(精练)(基础版)(原卷版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(基础版)(新高考地区专用)
7.5空间向量求空间角(精练)(基础版)(原卷版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(基础版)(新高考地区专用)
7.5空间向量求空间角(精练)(基础版)(原卷版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(基础版)(新高考地区专用)
7.5空间向量求空间角(精练)(基础版)(原卷版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(基础版)(新高考地区专用)
7.5空间向量求空间角(精练)(基础版)(原卷版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(基础版)(新高考地区专用)
7.5空间向量求空间角(精练)(基础版)(原卷版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(基础版)(新高考地区专用)

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7.5 空间向量求空间角(精练)(基础版) 题组一 线线角 1.(2022·辽宁丹东·模拟预测)在三棱锥 中, 平面ABC, , 是正三角形, M,N分别是AB,PC的中点,则直线MN,PB所成角的余弦值为( ) A. B. C. D. 2.(2022·贵州毕节·三模(理))在正四棱锥 中,底面边长为 ,侧棱长为 ,点P是底面 ABCD内一动点,且 ,则当A,P两点间距离最小时,直线BP与直线SC所成角的余弦值为 ( ) A. B. C. D. 3.(2022·青海·模拟预测(理))手工课可以提高学生的动手能力、反应能力、创造力,使学生在德、智、 体、美、劳各方面得到全面发展,某小学生在一次手工课上制作了一座漂亮的房子模型,它可近似地看成 是一个直三棱柱和一个长方体的组合图形,其直观图如图所示, , , P,Q,M,N分别是棱AB, , , 的中点,则异面直线PQ与MN所成角的余弦值是______.4.(2023·全国·高三专题练习)如图所示, 是棱长为 的正方体, 、 分别是下底面 的棱 、 的中点, 是上底面的棱 上的一点, ,过 、 、 的平面交上底面于 , 在 上,则异面直线 与 所成角的余弦值为___________. 题组二 线面角 1.(2022·上海市七宝中学高三阶段练习)如图所示,在长方体 中, , , 是棱 上的点,且 .(1)求三棱锥 的体积; (2)求直线 与平面 所成角的正弦值. 2.(2022·全国·高三专题练习)如图,在三棱柱 中, 底面 , 的中点为 , 四面体 的体积为 ,四边形 的面积为 . (1)求 到平面 的距离; (2)设 与 交于点O, 是以 为直角的等腰直角三角形且 .求直线 与平面所成角的正弦值. 3.(2022·全国·高三专题练习)如图,四棱锥 中,侧面 为等边三角形,且平面 底面 , , = = . (1)证明: ; (2)点 在棱 上,且 = ,求直线 与平面 的夹角 的正弦值. 4.(2023·全国·高三专题练习(理))如图,四面体 中, ,E 为 的中点. (1)证明:平面 平面 ; (2)设 ,点F在 上,当 的面积最小时,求 与平面 所成的角的正 弦值.5.(2023·全国·高三专题练习)如图,在直三棱柱 中, , , , E分别是 ,AB的中点,且 . (1)证明: ; (2)求 与平面 所成角的正弦值. 题组三 二面角 1.(2022·广东惠州·高三阶段练习)如图,在五面体 中, 为边长为2的等边三角形, 平面 , , . (1)求证:平面 平面 ;(2)若直线 与平面 所成角的正切值为 ,求平面BDE与平面ABC所成锐二面角的余弦值. 2.(2023·全国·高三专题练习(理))如图,在四棱锥 中,四边形 为直角梯形, ,平面 平面 . (1)证明: . (2)若四棱锥 的体积为 ,求平面 与平面 所成的锐二面角的余弦值. 3.(2023·全国·高三专题练习)如图,在四棱锥P-ABCD中,PC⊥底面ABCD,ABCD是直角梯形, AD⊥DC,AB∥DC,AB=2AD=2CD=2,点E是PB的中点. (1)证明:平面EAC⊥平面PBC; (2)若直线PB与平面PAC所成角的正弦值为 ;①求三棱锥P-ACE的体积; ②求二面角P-AC-E的余弦值. 4.(2022·四川·成都七中模拟预测(理))如图1,在等边 中,点D,E分别为边AB,AC上的动点 且满足 ,记 .将△ADE沿DE翻折到△MDE的位置并使得平面MDE⊥平面DECB,连接 MB,MC得到图2,点N为MC的中点.(1)当EN∥平面MBD时,求λ的值; (2)试探究:随着λ值的变化,二面角BMDE的大小是否改变?如果改变,请说明理由;如果不改变,请求 出二面角 的正弦值大小. 5.(2023·山西大同·高三阶段练习)如图,在四棱锥 中,平面 平面 , 是等腰直角三角形, 是底角.(1)求证:平面 平面 . (2)若 ,求二面角 的余弦值. 6.(2022·广东惠州·高三阶段练习)如图,在四棱锥P−ABCD中,已知AB∥CD,AD⊥CD,BC=BP, CD=2AB=4,△ADP是等边三角形,E为DP的中点. (1)证明:AE⊥平面PCD; (2)若 ,求平面PBC与平面PAD夹角的余弦值.
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  1. CONNECT:[ UseTime:0.000795s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000697s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000250s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000244s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000520s ]
  6. SELECT * FROM `set` [ RunTime:0.000353s ]
  7. SHOW FULL COLUMNS FROM `wendang` [ RunTime:0.000574s ]
  8. SELECT * FROM `wendang` WHERE `id` = 373597 LIMIT 1 [ RunTime:0.001619s ]
  9. UPDATE `wendang` SET `liulancishu` = 1 WHERE `id` = 373597 [ RunTime:0.006437s ]
  10. UPDATE `wendang` SET `lasttime` = 1773119405 WHERE `id` = 373597 [ RunTime:0.000523s ]
  11. SELECT * FROM `wendang` WHERE `id` < 373597 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.002124s ]
  12. SELECT * FROM `wendang` WHERE `id` > 373597 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000443s ]
  13. SELECT * FROM `wendang` WHERE `id` <> 373597 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.009088s ]
  14. SELECT * FROM `wendang` WHERE `id` <> 373597 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.020101s ]
  15. SELECT * FROM `wendang` WHERE `id` <> 373597 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.013144s ]
0.205091s