首页
试卷库
试题库
当前位置:
X题卡
>
所有题目
>
题目详情
已知向量,的夹角为60°,且. (1)在指定的位置用尺规作出向量2﹣; (2)求﹣与2+的夹角的余弦值; (3)求(λ∈R)的最小值.
查看本题答案
包含此试题的试卷
高一上学期数学《》真题及答案
点击查看
你可能感兴趣的试题
已知非零向量abc满足a+b+c=0向量ab的夹角为120°且|b|=2|a|求向量a与c的夹角
如图所示某铁路MN与公路PQ相交于点O.且夹角为90°其仓库G.在A.区到公路和铁路距离相等且到铁路
已知非零向量abc满足a+b+c=0向量ab的夹角为120°且|b|=2|a|则向量a与c的夹角为_
已知向量ab的夹角为60°|a|=2|b|=1则|a+2b|=.
已知向量ab的夹角为60°|a|=2|b|=1则|a+2b|=.
已知向量ab满足|a|=1|b|=2a与b的夹角为60°则|a-b|=________.
已知三个向量abc两两所夹的角都为120°|a|=1|b|=2|c|=3则向量a+b+c与向量a的夹
30°
60°
120°
150°
已知向量a与b的夹角为60°且a=-2-6|b|=则a·b=.
已知向量ab满足|a|=1|b|=3ab之间的夹角为60°那么a·a+b=.
已知向量ab夹角为45°且|a|=1|2a-b|=则|b|=________.
已知向量ab满足|a|=2|b|=1a与b的夹角为60°则|a-2b|等于.
已知ab为单位向量其夹角为60°则2a-b·b=
-1
1
2
已知向量ab满足a+2b·a-b=-6且|a|=1|b|=2则a与b的夹角为____________
已知向量ab若|a|=1|b|=2a⊥a+b则a与b夹角的大小为
120°
90°
60°
30°
已知向量ab的夹角为60°且|a|=2|b|=1则向量a与a+2b的夹角等于________.
已知向量ab满足|a|=1|b|=4且a·b=2则a与b的夹角为________.
已知向量a与b的夹角为60°且a=-2-6|b|=则a·b=________.
已知向量ab满足a+2b·a-b=-6且|a|=1|b|=2则a与b的夹角为________.
已知向量ab的夹角为60°且|a|=2|b|=1则向量a与向量a+2b的夹角等于
150°
90°
60°
30°
已知单位向量e1与e2的夹角为α且cosα=向量a=3e1-2e2与b=3e1-e2的夹角为β则co
热门试题
更多
Theprofessorfromafamousuniversitywillgiveussome技巧onhowtoimproveEnglish.
Whenpeopleusewordsandexpressiondifferentfromthestandardlanguageitiscalledadialect..
Eversincemiddleschoolwedreamedabouttakingagreatbiketrip..
Doyouwantafriendyoucouldtelleverythingtolikeyourdeepestfeelingsandthoughts?
BelieveornotthereisnosuchthingasstandardEnglish..
ButasthemoongavefarIdidn'tdareopenawindow.
Thefilmisbasedonatruestoryisquiteinteresting..
Inthelibrarywefoundlargeatlaswithgoodmapsthatshoweddetailsofworldgeography.
OneeveningthatitwassowarmIstayedawakeonpurposeuntilhalfpasteleveninordertohaveagoodlookatthemoonbymyself..
Ourjourneywouldbeginatthealtitudeofmorethan50000metres..
Hisserious态度towardshisworkwonthepraiseofthemanager.
青少年常常在和新同学相处方面有困难..
Somekindsofflowersbegintogrowatmidnight.对划线部分加以强调 .
Sobythe1600'sShakespearwasabletomakeuseofthaneverbefore
Sowhyovertime?Actuallyalllanguageschangeandevelopwhenculturesmeetandcommunicatewitheachother.
直到三天后我才意识到自己的错误.强调句.
Thedarkrainyeveningsthewindthethunderingcloudsheldmeentireintheirpower.
目前英语在我们的日常生活中起着重要的作用.翻译 .
After毕业fromcollegewefinallygotthechancetotakeabiketrip.
TodaythenumberofpeoplelearningEnglishinChinabeincreasingrapidly.
Twoyearsbeforeshewasonlyagraduatebutnowsheisthemanagerofthecompany..
Afterhisfatherwentoutheswaphismobilephoneforcandies..
AfterItoldherthedifficultieswemaymeetwithshegavemeadeterminedexpresswhichsaidshewouldbeafraidofnothing.
Theteacheraskedhisstudentcomeuptohisoffice.
HerfamilywasJewishsotheyhadtohideandtheywouldbecaughtbytheGermanNazis..
Wearelookingforsomeonewhoisrelyandhardworking.
Beforeourtripmysisterdidn'tlookatamap.Shedoesn't关系在意details.
词汇playsanimportantpartinreading.
MypartnerisinterestedinEnglishandhasagoodcommandwithit..
It'snopleasurelookthroughtheseanylongerbecausenatureisonethingreallymustbeexperienced.
热门题库
更多
高一下学期数学
教案备课库
高一上学期数学
高一上学期化学
教案备课库
教案备课库
教案备课库
高一上学期物理
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库