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1、Loveaperson,notbecauseheorshecanofferwhichisconvenient,butinhisorherbody,canseeyourgrowth.1.,,,是第三象限角,则(A )ABCD2.且则cos2x的值是( B )ABCD3.已知等腰三角形顶角的余弦值等于,则这个三角形底角的正弦值为(C)ABCD4.若是△的一个内角,且,则的值为(D)A.B.C.D.5.函数的单调递减区间是(D)A.B.C.D.6.若是周期为2的奇函数,则f(x)可以是AA.B.C.sinπxD.cosπx7.设中,则的值为BA.B.C.D.或8.已知
2、均为锐角,,则的值是DA.B.C.D.9.设A、B是△ABC的内角,并且,则A+B等于AA.B.C.D.kπ+(k∈Z)otherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthe
3、victoryofthelongMarch,hehasbeentheNorthwestOfficeoftheFederationofStateenterprisesMinister,ShenmufuguSARmissions,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,MinistersandLoveaperson,notbecauseheorshecanofferwhichisconvenient,butinhisorher
4、body,canseeyourgrowth.10.下列各式中值等于的是(A)A、B、C、D、11.若点在第一象限,则在内的取值范围是(B)A.B.C.D.12.=(C)A.B.C.2D.13.已知sinα+sinβ+sinγ=0,cosα+cosβ-cosγ=0,则cos(α-β)的值是A.-1B.1C.-D.14.已知sin(α-β)=,α-β是第一象限角,tanβ=,β是第三象限角,则cosα的值等于A.B.-C.D.-14.要得到函数的图像,只需将的图像(D )A、向右平移个单位B、向右平移个单位C、向左平移个单位D、向左平移个单位15.要得到函数y=cos
5、()的图象,只需将y=sin的图象(A)A.向左平移个单位B.同右平移个单位C.向左平移个单位D.向右平移个单位otherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevict
6、oryofthelongMarch,hehasbeentheNorthwestOfficeoftheFederationofStateenterprisesMinister,ShenmufuguSARmissions,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,MinistersandLoveaperson,notbecauseheorshecanofferwhichisconvenient,butinhisorherbody
7、,canseeyourgrowth.16.在范围内,方程)的解的个数是(D)A.1个B.2个C.3个D.4个17.若是一个三角形的最小内角,则函数的值域是(B)ABCD18.在中,,则等于(A)ABCD19.已知,则f(1)+f(2)+……+f(2005)+f(2006)=(A)A.B.C.1D.020.若函数f(x)=sinax+cosax(a>0)的最小正周期为1,则它的图像的一个对称中心为(C)A.B.(0,0)C.()D.21.(B)ABCD22.若,则的值为(C)....,∴..24.已知函数对任意实数均有成立,当时,.则当时,函数的表达式为(D)A.B
8、.C.D.