直线与平面位置关系问题1.等边三角形ABC与正方形ABDE有一公共边AB,二面角C-AB-D的余弦值为三分之根号三,M N 分别为AC BC的中点,则EM AN所成角的余弦值为多少?2.矩形ABCD和梯形BEFC所在平面相互垂
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/03 21:13:38
![直线与平面位置关系问题1.等边三角形ABC与正方形ABDE有一公共边AB,二面角C-AB-D的余弦值为三分之根号三,M N 分别为AC BC的中点,则EM AN所成角的余弦值为多少?2.矩形ABCD和梯形BEFC所在平面相互垂](/uploads/image/z/6243551-71-1.jpg?t=%E7%9B%B4%E7%BA%BF%E4%B8%8E%E5%B9%B3%E9%9D%A2%E4%BD%8D%E7%BD%AE%E5%85%B3%E7%B3%BB%E9%97%AE%E9%A2%981.%E7%AD%89%E8%BE%B9%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%8E%E6%AD%A3%E6%96%B9%E5%BD%A2ABDE%E6%9C%89%E4%B8%80%E5%85%AC%E5%85%B1%E8%BE%B9AB%2C%E4%BA%8C%E9%9D%A2%E8%A7%92C-AB-D%E7%9A%84%E4%BD%99%E5%BC%A6%E5%80%BC%E4%B8%BA%E4%B8%89%E5%88%86%E4%B9%8B%E6%A0%B9%E5%8F%B7%E4%B8%89%2CM+N+%E5%88%86%E5%88%AB%E4%B8%BAAC+BC%E7%9A%84%E4%B8%AD%E7%82%B9%2C%E5%88%99EM+AN%E6%89%80%E6%88%90%E8%A7%92%E7%9A%84%E4%BD%99%E5%BC%A6%E5%80%BC%E4%B8%BA%E5%A4%9A%E5%B0%91%3F2.%E7%9F%A9%E5%BD%A2ABCD%E5%92%8C%E6%A2%AF%E5%BD%A2BEFC%E6%89%80%E5%9C%A8%E5%B9%B3%E9%9D%A2%E7%9B%B8%E4%BA%92%E5%9E%82)
xTRF=::DJ'J4#@'}o{
!$16lR,H!Iw_]t)zWgϽܳ7Ě5:_ɨF>-Yծ+wX$tƺw$ۼUHPSZ P#2 6`dͳ2ڥ[ZI0.Z^'gn~-r%O3ZcC
~'豵]ӕUQyH=z9 F>nGމY3 mz7OP t M8[FAj(@dX㹛{[wA2*]e:D8e@ULG/ _G/!L 5Y^,M$rRx~G[P
mY˧ ;MXFƲXXUrA @ȵS]m/W;y`g]$Eqm!HFRph0uh~m#$iҏP&c;d3._k߆$UyABA7rTS_y""GԥgM)
&p,:&1 q!לjS4L[50b<9j]سIZلn؞iq9=\OSdiqvR%0x