首页
试卷库
试题库
当前位置:
X题卡
>
所有题目
>
题目详情
在△ABC中,∠C=90°,若AB=3,BC=1,则sinA的值为( )
查看本题答案
包含此试题的试卷
教案备课库《八年级数学锐角三角函数2》真题及答案
点击查看
你可能感兴趣的试题
如图△ABC中AB=BC∠ABC=90°F.为AB延长线上一点点E.在BC上且AE=CF1求证△AB
已知Rt△ABC中∠C=900AD平分∠BAC交BC于D.若BC=3且BDCD=12则D.到AB边的
1
2
3
无法确定
如图在直三棱柱ABC—A1B1C1中∠ACB=90°B.1B=BC=CA=4D.1是A.1B1中点E
在直角梯形ABCD中AB∥CD∠ABC=90°AB=2BC=2CD对角线AC与BD相交于点O.线段O
如图在直三棱柱ABCA.1B1C1中AC=3BC=4AB=5AA1=41求证:AC⊥BC1;2在AB
在△ABC中若cosA+2C﹣B+sinB+C﹣A=2且AB=2则BC=.
1在等腰Rt△ABC中∠C.=90°ACBCAB=___________2如图所示∠ACB=90°∠
如图在三棱柱ABCA.1B1C1中四边形AA1C1C是边长为4的正方形平面ABC⊥平面AA1C1CA
在△ABC中∠C.=90°若BC∶AC=3∶4AB=10则BC=_____AC=_____.
如图在△ABC中∠ABC=90°AB=BC=1P.为△ABC内一点∠BPC=90°.1若PB=求PA
如图在Rt△ABC中已知∠ABC=90°BC=8以AB为直径作⊙O.连结OC过点C.作⊙O.的切线C
在正三棱柱ABC-A1B1C1中D.是AC的中点AB1⊥BC1则平面DBC1积与平面CBC1所成的角
30°
45°
60°
90°
1在Rt△ABC中∠C.=90°.①若AB=41AC=9则BC=_______②若AC=1.5BC=
在△ABC中∠C.=90°M.是BC的中点.若sin∠BAM=则sin∠BAC=________.
在△ABC中若∠A.+∠B.=90°AC=5BC=3则AB=______AB边上的高CE=_____
如图在三棱柱ABC---A1B2C3中D.E.分别是ABBB1的中点1证明BC1∥平面A.1D2若A
如图四边形ABCD中ACBD是它的对角线∠ABC=∠ADC=90°∠BCD是锐角.1若BD=BC证明
如图在△ABC中∠ABC=90°AB=BC=1P.为△ABC内一点∠BPC=90°1若PB=求PA2
在Rt△ABC中∠C.=90°AB=4BC=2则sin=.
如图△ABC中∠ABC=90°.1请在BC上找一点P.作⊙P.与ACAB都相切切点为Q.尺规作图保留
热门试题
更多
已知直线ab平面α若a∥αb∥α则直线a与直线b的关系是
It'steno'clockinthemorning.Daleforatest. A.study B.studies C.studying D.isstudying
Therearesomementeachersbasketballontheplayground A.play B.playing C.plays D.toplay
Iusuallygotoschoolmybike. A.by B.with C.on. D.at
thefirstphotoIatthemall. A.On;shop B.On;shopping C.In;amshoping D.In;amshopping
—doesittaketogettoschool? A.Howsoon B.How C.Howlong D.Howfar
MybrotherthemorningTVeveryday.A.watches B.watch C.watchs D.see
—Yourbedroomissoclean.—Ofcourse.Iteveryday.A.clean B.cleaned C.iscleaned D.wascleaned
在如图所示的几何体中四边形DCEF为正方形四边形ABCD为等腰梯形.若线段AC上存在点M使AE∥平面FDM求的值.
eatinclass. A.Please B.Pleasenot C.Not D.Don't
已知平面外的两条平行直线中的一条平行于这个平面求证另一条也平行于这个平面.如图已知直线ab平面α且a∥ba∥αab都在平面α外求证b∥α.
Idomyhomeworkteno'clockeverynight. A.for B.on C.until D./
在正方体ABCD-A1B1C1D1中棱长为2点E在AD的中点点F在CD上若EF∥平面AB1C则线段EF的长度等于.
—muchwaterintheglass? —Noonlyalittle! A.Arethere B.Thereare C.Isthere D.Thereis
Ishewritingorreading?. A.Yesheis B.Noheisn't C.He'sreading D.Yesheiswriting.
Weareallgoodswimmingandit'sgoodourhealth. A.with;to B.at;to C.at;with D.at;for
TodayisSunday.Myfamilyallathome. A.am B.is C.are D.be
Itabout15minutes.A.takes B.take C.istakingD.totake
IhavethingstodoeverydaysoI'mbusy. A.toomany;toomuch B.toomany;muchtoo C.toomuch;muchtoo D.toomuch;toomany
—What'sthisT-shirt? —Cotton. A.madefrom B.madeof C.madein D.madeinto
Wetalkedaboutnewwords. A.learn B.learned C.learning D.tolearn
如图在四棱锥P-ABCD中四边形ABCD为矩形M为AC的中点N为PD上一点.若MN∥平面ABP求证N为PD的中点.
Shehastohelphermomdinnertoday. A.makes B.making C.make D.tomaking
It'snecessaryforusEnglishwell. A.tolearn B.learn C.learning D.learns
Idon'tmindyoungpeoplethinkofme. A.what B.why C.how D.that
Mollygoestoschoolherfather'scar. A.by B.in C.at D.on
—doyoulivefromschool? —8miles. A.Howlong B.Howfar C.Howmuch D.Where
Thankyouformetoplaythepiano. A.teach B.teaches C.teaching D.teacher
Dalianisagoodplacetovisit.Jack'sparentshimtovisitthereonvacation.A.hope B.let C.wish D.take
Igohome5:30theafternoon. A.at;on B.at;in C.at;at D.in;/
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
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