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=(cosx,cosωx),=(sinωx,﹣cosωx),ω>0且函数f(x)=•的两个对称中心之间的最小距离为 (Ⅰ)求f(x)的解析式及f()的值; (Ⅱ)若函数g(x)=a+1﹣f...
查看本题答案
包含此试题的试卷
高一下学期数学《》真题及答案
点击查看
你可能感兴趣的试题
已知向量a=cosxsinx=________.
数学表达式Inexy+|arctanx|cos3x对应的VisualBasic算术表达式是_____
Ln(E^(x+Abs(Tan()+cosx^3)
Log(Exp(x+Abs(Tan()+cos(^3)
Ln(Exp(x-x-+Abs(Atn()+cosx^3)
Log(Exp(x*+Abs(Atn()+co^3)
设f′cos2x=sin2x则fx等于
cosx+1/2cos
2
x+c
cos
2
x-1/2cos
4
x+c
x+(1/2)x
2
+c
x-(1/2)x
2
+c
设fx的一个原函数为cosxgx的一个原函数为x2则f[gx]等于
cosx
2
-sinx
2
cos2x
-sin2x
已知函数fx=2cos2x+2sinxcosxx∈R.1当x∈时求函数fx的单调递增区间2设△ABC
已知向量a=cosωx-sinωxsinωxb=-cosωx-sinωx2cosωx设函数fx=a·
若∫fxdx=x3+c则∫fcosxsinxdx等于式中c为任意常数
-cos3x+c
sin3x+c
cos3x+c
已知向量a=sinxcosxb=sinxsinxc=-10.1若x=求向量a与c的夹角θ2若x∈函数
已知sinx+cosx=m|m|≤且|m|≠1求sin4x+cos4x.
已知向量m=sinωx+cosωxcosωxn=cosωx-sinωx2sinωx其中ω>0函数fx
若fsinx=3﹣cos2x则fcosx=
3﹣cos2x
3﹣sin2x
3+cos2x
3+sin2x
已知向量a=cosωx+sinωxsinωxb=-cosωx+sinωx2cosωx设函数fx=a·
设fx的一个原函数为cosxgx的一个原函数为x则f[gx]等于
-sinx
cos2x
cosx
-sin2x
设f′cosx=sinx则fx等于
cos
x-1/2cos
x+c
x+(1/2)x
+c
cosx+1/2cos
x+c
x-(1/2)x
+c
设向量a=cosx-sinxb=且a//b则sin2x=________.
已知sin-θ+3cos+θ=0其中θ∈01求sinθcosθ的值2求函数fx=sin2x+tanθ
方程y-2y'+5y=0的通解为
y=e
x
(c
1
cosx+c
2
sinx)
y=e
-x
(c
1
cos2x+c
2
sin2x)
y=e
x
(c
1
cos2x+c
2
sin2x)
y=e
-x
(c
1
cosx+c
2
sinx)
已知f’2+cosx=sin2x+tan2x则fx=______.
已知向量m=sinA.cosA.n=-1且m·n=1且A.为锐角.1求角A.的大小2求函数fx=co
已知向量a=sinxcosxb=1-2且a∥b那么tanx=.
热门试题
更多
It'sasmallgasstationthathassnacksdrinkscigarettesandcandies.Theyoungmanbehindthecounterknowshis1bynameandwhattheynormallywanttobuy.Hetreatschildrenandadultswithequal2.Hereadssciencefictionbehindthecounterwhenbusinessin3. Onedaythreepeoplerushedinandgrabbedfoodofftheshelvesasfastastheycould4notintendingtopayforit.Hehitthepanicbuttonthenwentoverthecounterand5thefrontdoor.Itwasobvioustheywerehomelessandequallyobviousthattheyweren'tgoing6withtheirillgottengains.They7thefoodandsimplycrowdedtogetherinpanic﹣knowingthepolicewere8theway. Imaginewhattheymusthavefeltlikewhentheyweretoldtheydidn'thavetostealiftheywerethat9.Wehavefoodinthebackexpired到期butstill10toeat.Ifyouneedfoodyou11havesome. Theyweretoldto12whattheyhaddroppedandputitbackandthenaskedtostraightenoutthemess.Theyweredoingjustthat13thepolicearrived.Theofficersweretoldthesituationwasundercontrolandthepolicewerenolonger14. Thiswasn'twhattheyhad15.Theywerebeingtreatedashumanbeingswhocouldrightthewrongthey'ddone.Shockedtheyquicklyfollowedorderstotaketurnsandusetherestroomtocleanup. Soonthree16peoplewalkedoutwithallthe17theirarmscouldhold.Theywere18thatiftheyneededtocomebackagaintheyweretoaskandnotjustgrab. Andthentheyoungmanwentbacktoreaduntilthenextcustomercamein.Hewouldbethe19personintheworldtoclaimhewasahero.Buthegavethreepeoplesomethingtheywereindesperateneedof﹣a20amountofself﹣respectandalittlebitofhope. 1A.friends B.neighbors C.customers D.passengers 2A.respect B.pride C.wisdom D.privilege 3A.slow B.busy C.heavy D.swift 4A.bravely B.reasonably C.hardly D.obviously 5A.opened B.locked C.closed D.broke 6A.nowhere B.somewhere C.anywhere D.everywhere 7A.hid B.lifted C.swallowed D.dropped 8A.in B.on C.off D.by 9A.anxious B.cautious C.courageous D.hungry 10A.safe B.easy C.sweet D.unique 11A.must B.can C.should D.need 12A.holdup B.handout C.pickup D.handin 13A.when B.after C.before D.since 14A.popular B.necessary C.reliable D.important 15A.wanted B.desired C.expected D.admired 16A.dirtier B.cleaner C.cleverer D.quicker 17A.money B.cigarettes C.drinks D.food 18A.reminded B.warned C.ordered D.persuaded 19A.first B.last C.best D.worst 20A.large B.fair C.small D.full
Hearguedsmokingandinsistedthatitwasargumentthatsmokingwasharmfultohealth. A.forbeyond B.againstover C.forover D.againstbeyond
已知函数 Ⅰ当a=3时求fx的极值 Ⅱ若fx在区间上是增函数求实数a的取值范围.
ThepolarbearisfoundintheArcticCircleandsomebiglandmassesasfarsouthasNewfoundland.Whiletheyarerarenorthof88°thereisevidence1theyrangeallthewayacrosstheArcticandasfarsouthasJamesBayinCanada.Itisdifficulttofigureoutaglobalpopulationofpolarbearsasmuchoftherangehasbeen2poorstudiedhoweverbiologistscalculatethatthereareabout20000﹣25000polarbearsworldwide. Modernmethods3trackingpolarbearpopulationshavebeenemployedonlysincethemid﹣1980sandareexpensive4performconsistentlyoveralargearea.InrecentyearssomeInuitpeopleinNunayut5reportincreasesinbearsightingsaroundhumansettlementsleadingtoa6believethatpopulationsareincreasing.Scientistshaverespondedby7notethathungrybearsmaybecongregating聚集aroundhumansettlementsleadingtotheillusion错觉thatpopulationsare8highthantheyactuallyare.Of9nineteenrecognizedpolarbearsubpopulationsthreearedecliningsix10bestableoneisincreasingandninelackenoughdata.
若大前提是“任何实数的绝对值都大于0”小前提是“a∈R”结论是“|a|>0”那么这个演绎推理
篮子里装有2个红球3个白球和4个黑球.某人从篮子中随机取出两个球记事件A=“取出的两个球颜色不同”事件B=“取出一个红球一个白球”则PB|A=
用反证法证明命题设ab为实数则方程x2+ax+b=0至多有一个实根时要做的假设是
Whenwhathisnamewashejustkeptsilent. A.asking B.toask C.tobeasked D.asked
bytheadvancesintechnologymanyfarmershavesetupwindfarmsontheirland. A.Beingencouraged B.Encouraging C.Encouraged D.Havingencouraged
如图所示的数阵中第21行第2个数字是.
WhereweliveontheeasternshoreofMarylandthegentlewatersruninandoutlikefingersslimmingatthetips. TheCanadageeseknowthisplaceasdothewhiteswansandtheducks.Inautumntheycomehomeforthewinter.Onceortwiceeachyearsnowandfrozenrainmoveintothearea.Whenthishappensiftheriverisatitsnarrowestthereisafreezewhichhardensthewatertoice. OnemorningafriendofminesetthebreakfasttablebesidethehugewindowwhichoverlookedtheTredAvonRiver.SuddenlysheleanedforwardandcriedoutThereisagooseoutthere. WesawthefigureofalargeCanadagooseverystillitswingsfoldedtighttoitssidesitsfeetfrozenintotheice. Thenfromthedarkskiesshesawalineofswans.Theyfloatedfromthetopoftheskydownwardandatlastlandedontheice.Myfriendwasonherfeetnowwithonehandagainsthermouthunbelieving.Astheswanssurroundedthefrozengooseshefearedthatlifeitstillhadmightbepecked啄outbythosegreatswanbills. Insteadthosebillsbegantoworkontheice.Thelongneckswereliftedandcurveddownagainandagain.Itwentonforalongtime.Atlastthegoose'sheadwaslifted.Itsbodywaspulled.Thenthegoosewasfreeandstoodontheice.Andtheswansstoodintheairwatching.ThenasifithadcriedIcannotfly.Fouroftheswanscamedownaroundit.Theirpowerfulbeakschippedofftheiceheldinthefeathers.Slowlythegoosespreaditswingsasfarastheywouldgoandmovedslowlyintothesky. Thisisatruestory.IjustthinkofitinthebadmomentandfromitcomesonlyonehopefulquestionIfsoforbirdswhynotforman? 1Whichwouldbethebesttitleforthepassage? A.Whynotforman? B.Gracefulswans C.Swans'braveact D.Ijustcouldn'tbelieveit! 2WhathappenedtotheCanadagoose? A.Itwasdesertedbyothergeese. B.Itwasstuckintheice. C.Itwaswoundedandcouldn'tfly. D.Itwaslostinthewater. 3Atfirsttheauthor'sfriendwasworriedthat. A.theswanswouldnothelptheCanadagoose B.shedidn'tcareaboutthismatteranymore C.theswanswouldn'tidentifywiththeCanadagoose D.theswanswouldpecktheCanadagoosetodeath 4WhatdidtheswansdowhentheysawtheCanadagoosecouldn'tfly? A.Theychippedofftheiceheldinitsfeathers. B.Theywaitedpatientlyfortheiceheldinitsfeatherstomelt. C.Theycamedownandliftedituptotheskytogether. D.Theystayedwithitandprotectedit. 5Whatwouldprobablyhappentotheauthor'sfriendintheend? A.Shestoodtherewatchingattentivelystillfeelingabitworried. B.Shedidn'tcareaboutthismatteranymore. C.Shewasembarrassedandwentonwithherbreakfastsilently. D.Shestoodtherequietlynotrealizingtearshadcomedownhercheeks.
函数fx=1+sinx其导函数为f′x则f′=
Heallofthehotwater. A.usedup B.gaveout C.ranout D.usedout
已知随机变量X服从正态分布N3δ2且Px≤6=0.9则P0<x<3=
设△ABC的周长为l△ABC的面积为S内切圆半径为r则类比这个结论可知四面体A﹣BCD的表面积分别为T内切球半径为R体积为V则V等于
已知函数a为实数. Ⅰ若fx在x=1处取得极值求a的值 Ⅱ讨论函数fx的单调性.
NeedaJobThisSummer? Theprovincialgovernmentanditspartnersoffermanyprogramstohelpstudentsfindsummerjobs.Thedeadlinesandwhatyouneedtoapplydependontheprogram. Notastudent?Gotothegovernmentwebsitetolearnaboutprogramsandonlinetoolsavailabletohelppeopleunder30buildskillsfindajoborstartbusinessesallyearround. JobsforYouth Ifyouareateenagerlivingincertainpartsoftheprovinceyoucouldbeeligible符合条件forthisprogramWhichprovideseightweeksofpaidemploymentalongwithtraining. WhoiseligibleYouth15﹣18yearsoldinselectcommunities社区. SummerCompany SummerCompanyprovidesstudentswithhands﹣onbusinesstrainingandawardsofupto$3000tostartandruntheirownsummerbusinesses. WhoiseligibleStudentsaged15﹣29returningtoschoolinthefall. StewardshipYouthRangerProgram YoucouldapplytobeaStewardshipYouthRangerandworkonlocalnaturalresourcemanagementprojectsforeightweeksthissummer. WhoiseligibleStudentsaged16or17attimeofhirebutnotturning18beforeDecember31thisyear. SummerEmploymentOpportunities机会 ThroughtheSummerEmploymentOpportunitiesprogramstudentsarehiredeachyearinavarietyofsummerpositionsacrosstheProvincialPublicServiceitsrelatedagenciesandcommunitygroups. WhoiseligibleStudentsaged15orolder.Somepositionsrequirestudentstobe15to24orupto29forpersonswithadisability. 1WhatisspecialaboutSummerCompany? A.Itrequiresnotrainingbeforeemployment. B.Itprovidesawardsforrunningnewbusinesses. C.Itallowsonetoworkinthenaturalenvironment. D.Itoffersmoresummerjobopportunities. 2WhatistheagerangerequiredbyStewardshipYouthRangerProgram? A.15﹣18. B.15﹣24. C.15﹣29. D.16﹣17. 3Whichprogramfavorsthedisabled? A.JobsforYouth. B.SummerCompany. C.StewardshipYouthRangerProgram. D.SummerEmploymentOpportunities.
OntheexhibitswerewrittenNot. A.ForSale B.OnSale C.ToSell D.BeingSold
Asdataandidentitytheftbecomesmoreandmorecommonthemarketisgrowingforbiometric生物测量technologies﹣likefingerprintscans﹣tokeepothersoutofprivatee﹣spaces.Atpresentthesetechnologiesarestillexpensivethough. ResearchersfromGeorgiaTechsaythattheyhavecomeupwithalow﹣costdevice装置thatgetsaroundthisproblemasmartkeyboard.Thissmartkeyboardpreciselymeasuresthecadence节奏withwhichonetypesandthepressurefingersapplytoeachkey.Thekeyboardcouldofferastronglayerofsecuritybyanalyzingthingsliketheforceofauser'stypingandthetimebetweenkeypresses.Thesepatternsareuniquetoeachperson.Thusthekeyboardcandeterminepeople'sidentitiesandbyextensionwhethertheyshouldbegivenaccesstothecomputerit'sconnectedto﹣regardlessofwhethersomeonegetsthepasswordright. Italsodoesn'trequireanewtypeoftechnologythatpeoplearen'talreadyfamiliarwith.Everybodyusesakeyboardandeverybodytypesdifferently. Inastudydescribingthetechnologytheresearchershad100volunteerstypethewordtouchfourtimesusingthesmartkeyboard.Datacollectedfromthedevicecouldbeusedtorecognizedifferentparticipantsbasedonhowtheytypedwithverylowerrorrates.Theresearcherssaythatthekeyboardshouldbeprettystraightforwardtocommercializeandismostlymadeofinexpensiveplastic﹣likeparts.Theteamhopestomakeittomarketinthenearfuture. 1Whydotheresearchersdevelopthesmartkeyboard? A.Toreducepressureonkeys. B.Toimproveaccuracyintyping. C.Toreplacethepasswordsystem. D.Tocutthecostofe﹣spaceprotection. 2Whatmakestheinventionofthesmartkeyboardpossible? A.Computersaremucheasiertooperate. B.Fingerprintscanningtechniquesdevelopfast. C.Typingpatternsvaryfrompersontoperson. D.Datasecuritymeasuresareguaranteed. 3Whatdotheresearchersexpectofthesmartkeyboard? A.It'llbeenvironment﹣friendly. B.It'llreachconsumerssoon. C.It'llbemadeofplastics. D.It'llhelpspeeduptyping. 4Whereisthistextmostlikelyfrom? A.Adiary. B.Aguidebook. C.Anovel. D.Amagazine.
Hedidn'tgointodetailsonthesubject.Hejustspoke. A.inparticular B.incommon C.inshort D.ingeneral
IsFreshAirReallyGoodforYou? Weallgrewuphearingpeopletellustogooutandgetsomefreshair.1AccordingtorecentstudiestheanswerisabigYESiftheairqualityinyourcampingareaisgood. 2Iftheairyou'rebreathingisclean﹣whichitwouldbeifyou'reawayfromthesmogofcities﹣thentheairisfilledwithlife﹣givingenergizingoxygen.Ifyouexerciseoutofdoorsyourbodywilllearntobreathemoredeeplyallowingevenmoreoxygentogettoyourmuscles肌肉andyourbrain. Recentlypeoplehavebegunstudyingtheconnectionbetweenthenaturalworldandhealing治愈.3Intheseplacespatientscangotobenearnatureduringtheirrecovery.Itturnsoutthatjustlookingatgreengrowingthingscanreducestresslowerbloodpressureandputpeopleintoabettermood情绪.Greeneryisgoodforus.HospitalpatientsWhoseetreebranchesouttheirwindowarelikelytorecoveratafasterratethanpatientswhoseebuildingsorskyinstead.4Itgivesusagreatfeelingofpeace. 5Whilethesun'srayscanageandharmourskintheyalsogiveisbeneficialVitaminD.TomakesureyougetenoughVitaminD﹣butstillprotectyourskin﹣putonsunscreenrightasyouheadoutside.Ittakessunscreenaboutfifteenminutestostartworkingandthat'splentyoftimeforyourskintoabsorbaday'sworthofVitaminD. A.Freshaircleansourlungs. B.Sowhatareyouwaitingfor? C.Beinginnaturerefreshesus. D.Anothersidebenefitofgettingfreshairissunlight. E.Butisfreshairreallyasgoodforyouasyourmotheralwayssaid? F.Justasimportantlywetendtoassociateairwithhealthcare. G.AllacrossthecountryrecoverycentershavebegunbuildingHealingGardens.
在1+x3+1+x4+…+1+x2007的展开式中x3的系数等于
假定你是李华暑假在伦敦学习得知当地美术馆要举办中国画展.请写一封信申请做志愿者内容包括 1.写信目的 2.个人优势 3.能做的事情. 注意 1.词数100左右 2.可以适当增加细节以使行文连贯 3.结束语已为你写好.
函数fx的定义域为Rf1=7对任意x∈Rf'x>3则fx>3x+4的解集为
已知i为虚数单位则复数z的共轭复数等于
一个物体的位移s米与时间t秒的关系为s=2+10t﹣t2则该物体在3秒末的瞬时速度是
若复数z1=a+2ia∈Rz2=2﹣3i且为纯虚数 Ⅰ求a的值 Ⅱ求|z1•z2|.
函数fx的定义域为ab导函数f'x在ab内的图象如图所示则函数fx在ab内有个极大值点.
定积分2x+exdx的值为
Veryfewpeopleinlosingweightthesedays. A.manage B.try C.succeed D.intend
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