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1、三角函数单元测试题（一）20151201一、填空1.将－300o化为弧度为2.如果点位于第三象限，那么角所在象限是3.若角的终边落在直线y=2x上，则sin的值为4.函数y=cos2x–3cosx+2的最小值是5.已知cos(750-x)=,其中x是第四象限角，则cos(1050+x)+sin(x+1050)的值为6.某扇形的面积为1，它的周长为4，那么该扇形圆心角的弧度数为7．已知角终边上一点P（－4，3），则的值为8．已知的取值范围是9.已知的值为10.、、的大小关系为11．已知则12．函数的定义域是________
2、_13.化简=_________14.设为常数），且那么二、解答15．(14分)已知的值otherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAf
3、terthevictoryofthelongMarch,hehasbeentheNorthwestOfficeoftheFederationofStateenterprisesMinister,ShenmufuguSARmissions,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersand16.(14分)已知，求的值。17.(14分)一扇形周长为20cm，当扇形的圆心
4、角等于多少弧度时，这个扇形的面积最大？并求此扇形的最大面积？otherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryo
5、fthelongMarch,hehasbeentheNorthwestOfficeoftheFederationofStateenterprisesMinister,ShenmufuguSARmissions,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersand18.(16分)已知,求的值.19.(16分)求证：otherstaffoftheCentre.During
6、thewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeentheNorthwestOfficeoftheFederationof
7、StateenterprisesMinister,ShenmufuguSARmissions,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersand20.(16分)若关于x的方程有实根，求实数a的取值范围.otherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthen
8、ewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongM
