一道高中空间几何题,在直三棱柱ABC-A1B1C1中,已知AB=AC,F为BB1上一点,BF=BC=2,FB1=1,D为BC中点,E为线段上不同A,D于的点.(1)证明EF垂直FC1.(2)AB=根号2,是否存在E满足EF与FA1C1所成角的正弦为根号30/6?请说明
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/31 03:27:42
![一道高中空间几何题,在直三棱柱ABC-A1B1C1中,已知AB=AC,F为BB1上一点,BF=BC=2,FB1=1,D为BC中点,E为线段上不同A,D于的点.(1)证明EF垂直FC1.(2)AB=根号2,是否存在E满足EF与FA1C1所成角的正弦为根号30/6?请说明](/uploads/image/z/8248789-37-9.jpg?t=%E4%B8%80%E9%81%93%E9%AB%98%E4%B8%AD%E7%A9%BA%E9%97%B4%E5%87%A0%E4%BD%95%E9%A2%98%2C%E5%9C%A8%E7%9B%B4%E4%B8%89%E6%A3%B1%E6%9F%B1ABC-A1B1C1%E4%B8%AD%2C%E5%B7%B2%E7%9F%A5AB%3DAC%2CF%E4%B8%BABB1%E4%B8%8A%E4%B8%80%E7%82%B9%2CBF%3DBC%3D2%2CFB1%3D1%2CD%E4%B8%BABC%E4%B8%AD%E7%82%B9%2CE%E4%B8%BA%E7%BA%BF%E6%AE%B5%E4%B8%8A%E4%B8%8D%E5%90%8CA%2CD%E4%BA%8E%E7%9A%84%E7%82%B9.%281%29%E8%AF%81%E6%98%8EEF%E5%9E%82%E7%9B%B4FC1.%282%29AB%3D%E6%A0%B9%E5%8F%B72%2C%E6%98%AF%E5%90%A6%E5%AD%98%E5%9C%A8E%E6%BB%A1%E8%B6%B3EF%E4%B8%8EFA1C1%E6%89%80%E6%88%90%E8%A7%92%E7%9A%84%E6%AD%A3%E5%BC%A6%E4%B8%BA%E6%A0%B9%E5%8F%B730%2F6%3F%E8%AF%B7%E8%AF%B4%E6%98%8E)
xXrTE9pS"8Nq,%XNӀ$ p 47 _wO
IUP,}v>}d4+o7R~_in\U[k̉JQyx!.GY
FV2<NjPgϖᑀ;>t(
j7v!J|IC$y:ŠLY?>wwb'_[WnE*'0pLLH65d$}2(9l+ZOS_J;`^UME8tkb9WtUu§^5VtrAB̪ıZSHThY>'RpR^Uzmn2`J0]'<|nVfU۷3,Qb9>Sq5ԱHم
ObbaK+r'1&H$e_^I9U\s X'OؙЂ/>LiG/#/7~͋_~=9r/Sۋ{_F5_ӽwpB}zԄoB|>85ۣ=&SO{>ZڠOiZ@gȖ>md6|`B{6
>g: >B훉WT7]54ve"yG#(bug@)9H>{| 5V<"+jﰆHv}aUN:`.K7wށQ~mKڱN1th/vAvz16ڪ>LGbz
H ,;)vʐ ܉XUאwC]0SRwT$+_0+1//M*
M1KN`vR1ܠڱRA-N2N>Duk;?d"[]>
/|~ռCo)hrWhD=ZlL5^^&)Lx>LߪɀaE#%:y?hj|,cWG0:9x~ŷ#?VxZh
zk3,kg)磁.ʏ=!l!z#%<#kyi0VDڄ,GƎahPD-ZS8@)"˘N <4^rƹdkX&NjKɎCs]u>fn]"7vn?iJafƤJOTeV9B6 9!Zv7rqQc(D\`PNU2"yJ_ ft8(A"{$mXUPӤث`s
GNq$#&݈®-ȷHkqtLfc