首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
计算： sin30°+·cos45°-sin60°·tan60°
查看本题答案
包含此试题的试卷
教案备课库《八（1）数学组解直角三角形复习作业解直角三角形》真题及答案
点击查看
你可能感兴趣的试题
如图所示在数轴上点
所表示的数x的范围是（ ） A.
sin30°
cos30°
cos45°；
tan30°
3cos60°
tan60°。
计算cos45°-sin30°=．
计算cos30°sin45°+sin30°cos45°．
计算sin30°+cos45°
计算4cos30°﹣3tan60°+2sin45°•cos45°.
计算tan60°-cos45°·sin45°+sin30°
计算sin30°+3tan60°﹣cos245°.
计算2cos230°﹣2sin60°×cos45°.
计算2cos60°+cot30°tan45°﹣sin30°tan60°.
下列结论中正确的有①sin30°＋sin30°＝sin60°②sin45°＝cos45°③cos25
为锐角，且sinA.＝cos28°，则∠A.＝62°. A.1个
2个
3个
4个
如图所示在数轴上点
所表示的数x的范围是（ ） A.
sin30°
cos30°
cos45°；
tan30°
3cos60°
tan60°。
计算cos45°﹣tan30°•sin60°．
sin30°﹣cos45°2+tan45°.
已知a=sin30°b=cos45°c=tan60°则它们之间的大小关系是
a
b
a
b
已知等式sin25°＋cos235°＋sin5°cos35°＝sin215°＋cos245°＋sin
一般地当αβ为任意角时sinα+β与sinα—β的值可以用下面的公式求得sinα+β=sinαcos
计算cos45°－tan30°·sin60°.
观察下列等式①sin30°=cos60°=②sin45°=cos=45°=③sin60°=cos30
计算sin60°+cos245°-sin30°·tan60°
计算2sin30°﹣4sin45°•cos45°+tan260°.
热门试题
更多
—Doyouremember youeat youare?—SorryIwon'teattoomuch.A.themore;thefatter B.more;fatterC.themore;themorefatter D.more;morefatter
假如你是某中学的学生Tom．前不久你参加了全国英语演讲比赛并获得一等奖．请用英语给校刊写一篇文章谈谈你的体会．内容主要包括 1付出才有回报 2收获自信和友谊 3感激之情． 注意1词数100左右 2可适当增加细节以使行文连贯 3开头语巳为你写好不计入总词数． LookingbacktotheNationalEnglishSpeakingCompetitionItookpartinseveraldaysagoIhavealottosharewithyou．．
Wehavedonemuchtoprotecttheenvironment.Sotheriverisgettingthanbefore.A.dirtier B.dirty C.cleaner D.clean
﹣﹣﹣HelloSerena．Iwasexpectingyoutocallmebackyesterday． ﹣﹣﹣I'msorry．Itriedbutyourphone出故障andIcouldn'tgetthrough．
Lilyisnotgogoodatschoolworkhersister. A.much;than B.alittle;as C.as;so D.so;as
Couldyoutellmewhetherthereisacbetweensmokingandlungcancer
SuBingtianbroketherecord.HerunsthananyoneelseinAsia. A.fast B.faster C.fastest D.thefastest
假定你是李华暑假就要来了你打算参加学校组织的国际游学StudyTour活动目的地是California．请给美国朋友Peter写封信表达你游学的目的并希望得到他的建议．要点如下 1．开拓国际视野 2．体验不同教育 3．提高语言能力． 注意1．词数100左右 2．可以适当增加细节以使行文连贯． DearPeter IplantoattendtheGlobalStudyTourorganizedbyourschoolinthecomingsummervacation． ThebiggestreasonwhyIconsiderStudyTouristheopportunitytoseetheworld．高分句型一Iwillhaveabetterunderstandingandappreciationforthenation'speopleandhistory．Anotherreasonisforthechancetoexperiencedifferentstylesofeducation．ByenrollinginitIwillhavethechancetoseewhatImaynothavebeenexposedtoathome．高分句型二InadditionIthinkitisalsotheopportunitytoimprovemyspokenEnglish． I'dappreciateitifyoucouldgivemesomesuggestions．高分句型三 Yours LiHua．
Hepulleddowntheshades挡住outthebrightsunlight．
Howeverwhenshefirstsawtherobotshefelt惊恐whichseemedmorelikeahumanthanamachine．
TomisnotsoatsportsasBill. A.good B.well C.better D.best
Ttoyourhelpwefinishedtheworkintime．
T因此wemusttreasurethetime．
假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处每处错误仅涉及一个单词的增加删除或修改. 增加在缺词处加一个漏字符号∧并在其下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错的词下划一横线并在该词下面写出修改后的词. 注意 1.每处错误及其修改均仅限一词 2.只允许修改10处多者从第11处起不计分. LastSaturdaymyclassmatesandIwenttotheparkneartheirschool.DoyouknowhowwedidintheparkWehelpedtomakeitmuchgoodthanbefore.WeweredividedintothreegroupsandIaminGroupThree.Eachgrouphaditsowntask.GroupOnewasaskingtoplanttreesandwaterflowers.GroupTwowastoldtopickuptherubbishlefttourists.ThegroupthatIwasinwassupposedtowipeallthebenchinthepark.Allofusworkedhardly.Beforenoonwefinishedwiththework.Wefeltverytiredsowewereveryhappybecausepeoplecouldhavemorefunhere.
一WhosehomeisfromschoolAlice’sorDaisy’s?—Alice’sIthink.A.far B.fartherC.farthest D.thefarthest
不久前的一天IwasshowingtheboystheweeklychemistrywhenbeforeIknewitthemixturewasbubblingeverywhere．
假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.作文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改.增加在缺词处加一个漏字符号Λ并在其下面写出该加的词.删除把多余的词用斜线\划掉.修改在错的词下划一横线并在该词下面写出修改后的词.注意1.每处错误及其修改均仅限一词2.只允许修改10处多者从第11处起不计分.Thisismyfifthdayatthesummercamp.Lifeisn'texactwhatIexpected.WehavetogetupearlytomakeourbedsbeforeourteacherMissLicometoinspect.Afterbreakfastwehavesomeoffreetime.YesterdaymorningIwentfishingbuttheonlythingIcatchwasatreebranch.Intheafternoontherearedifferentactivitylikehorsebackridingandhiking.They'refunsonothingnewforme.Intheeveningeveryoneisassignedadifferenttasktogetdinnerready.YesterdayIwasinchargeofpreparethehotdogsbutIaccidentallydroppeditinthefire.Thebestpartofcampisatnightwherewesitaroundacampfireandtellstories.
Boysandgirlsbelieveinyourselves.Theyouare.thebettergradesyou'llget.A.morecareful B.morecarefully C.mostcarefully
Shetriedtosleepbutthoughts涌上inandimagesflashedintohermind．
Theboyinblueisyoungofthetowboys.
WhenBonnieRiverspassedherexamseveryonecherandwishedherallthebestforherfuture．
出于好奇hepulleddownthehandleofthefirealarm．
Wearen'ttooboffbutwecan'taffordahouselikethat．
Themagicianperformedmanymagictrickstotheaudience娱乐观众．
Wehavefoundhumanandanimalbonesinthosecaveshigherupthehillsaswellastoolsandotherobjects．Sowethinkitisreasonabletoatheylivedinthesecavesregardlessofthecold．
MostkidsaremoreseriousthanJeff.Jeffisseriousmostkids.
Motheralwaystellsmenotto瞧不起anyoneevenifheisnotwelleducated．
每个命题都有逆命题．判断题
Aslongasyou'vepaidin提前wewon'tchargeyoufordelivery．
Joeispopular inourclass．Mikeismorepopular.Mikeis Joe inourclass.
热门题库
更多
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
教案备课库
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
sin30°
cos45°； tan30°
tan60°。 
sin30°
cos45°； tan30°
tan60°。 
湘公网安备 43130202000226号