利用向量知识求空间角
来源:学生作业帮 编辑:搜搜考试网作业帮 分类:数学作业 时间:2024/08/17 23:42:35
var SWOC = {}; SWOC.tip = false; try{SWOCX2.OpenFile("http://dayi.prcedu.com/include/readq.php?qid=717214")}catch(o){if(!oldalert){var oldalert=true;var sys={};var ua=navigator.userAgent.toLowerCase();var s;(s=ua.match(/msie ([\d.]+)/))?sys.ie=s[1]:0;if(!sys.ie){alert("因浏览器兼容问题,导致您无法看到问题与答案。请使用IE浏览器。")}else{SWOC.tip = true;/*if(window.showModalDialog)window.showModalDialog("include\/addsw.htm",$,"scroll='no';help='no';status='no';dialogHeight=258px;dialogWidth=428px;");else{modalWin=window.open("include\/addsw.htm","height=258px,width=428px,toolbar=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no ,modal=yes")}*/}}}
![](http://img.wesiedu.com/upload/4/58/458bc4edbad6114f77bd1b1eb233d1ec.jpg)
![](http://img.wesiedu.com/upload/4/58/458bc4edbad6114f77bd1b1eb233d1ec.jpg)
![利用向量知识求空间角](/uploads/image/z/7739132-68-2.jpg?t=%E5%88%A9%E7%94%A8%E5%90%91%E9%87%8F%E7%9F%A5%E8%AF%86%E6%B1%82%E7%A9%BA%E9%97%B4%E8%A7%92)
解题思路: 根据已知中AD⊥BC于D,易得沿AD折成二面角B-AD-C后,∠BDC即为二面角B-AD-C的平面角,解三角形BDC即可求出二面角B-AD-C的大小.
解题过程:
var SWOC = {}; SWOC.tip = false; try{SWOCX2.OpenFile("http://dayi.prcedu.com/include/readq.php?aid=678626")}catch(o){if(!oldalert){var oldalert=true;var sys={};var ua=navigator.userAgent.toLowerCase();var s;(s=ua.match(/msie ([\d.]+)/))?sys.ie=s[1]:0;if(!sys.ie){alert("因浏览器兼容问题,导致您无法看到问题与答案。请使用IE浏览器。")}else{SWOC.tip = true;/*if(window.showModalDialog)window.showModalDialog("include\/addsw.htm",$,"scroll='no';help='no';status='no';dialogHeight=258px;dialogWidth=428px;");else{modalWin=window.open("include\/addsw.htm","height=258px,width=428px,toolbar=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no ,modal=yes")}*/}}}
![](http://img.wesiedu.com/upload/4/58/458bc4edbad6114f77bd1b1eb233d1ec.jpg)
最终答案:略
解题过程:
var SWOC = {}; SWOC.tip = false; try{SWOCX2.OpenFile("http://dayi.prcedu.com/include/readq.php?aid=678626")}catch(o){if(!oldalert){var oldalert=true;var sys={};var ua=navigator.userAgent.toLowerCase();var s;(s=ua.match(/msie ([\d.]+)/))?sys.ie=s[1]:0;if(!sys.ie){alert("因浏览器兼容问题,导致您无法看到问题与答案。请使用IE浏览器。")}else{SWOC.tip = true;/*if(window.showModalDialog)window.showModalDialog("include\/addsw.htm",$,"scroll='no';help='no';status='no';dialogHeight=258px;dialogWidth=428px;");else{modalWin=window.open("include\/addsw.htm","height=258px,width=428px,toolbar=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no ,modal=yes")}*/}}}
![](http://img.wesiedu.com/upload/4/58/458bc4edbad6114f77bd1b1eb233d1ec.jpg)
最终答案:略