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△ABC中,A=,BC=3,则△ABC的周长为A.4sin(B+)+3B.4sin(B+)...
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△ABC中,A=
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAkAAAAjCAYAAABGpiBAAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC2SURBVDhP1ZLREcMgCECZjJ1Yh2UYhVGogFrO
0LQ/7V3fnTmTPAEVsA/4Z0mMAAyagawpCdHQzJTJ4puyIbLl72SnE8KUhAx6SY0xI4ZEMduk5Clg
pcVO8iij0JkipDkX5ilFlOdO1rvvbgXchd/xa6leQzdCiucbviGVQ+zvzntq33z2V/VSUp1CItRJ
lZetMvEINzUVzq4YXKVB7Smnlc66Gik79bo7X7kO8jgjp0938FPJ7AE18l+z+pChnwAAAABJRU5E
rkJggg==
)
,BC=3,则△ABC的周长为( )
A.4
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACoSURBVDhPzZC7DQQhDAVdFwHlkNMJMYWQUsgG
LuUdxl4JpN07ILqRLFmYkT+EB4hoLez/hBRW+HeZM7zsKBGrPS7JFdFn8J232u3/lplNVGrckUdq
3B1bkY4HOw/Y4XzWRfbkBmcPsgMSStBxKGi18U0e96ZSSk+SI7h09fxdZmT/dO0+gXafZOnUJ9MY
7jXvHFpRur93npl+XcmBXDqTBel+LAtrMvABvDKYogJWgwAAAAAASUVORK5CYII=
)
sin(B+
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAkAAAAjCAYAAABGpiBAAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC2SURBVDhP1ZLREcMgCECZjJ1Yh2UYhVGogFrO
0LQ/7V3fnTmTPAEVsA/4Z0mMAAyagawpCdHQzJTJ4puyIbLl72SnE8KUhAx6SY0xI4ZEMduk5Clg
pcVO8iij0JkipDkX5ilFlOdO1rvvbgXchd/xa6leQzdCiucbviGVQ+zvzntq33z2V/VSUp1CItRJ
lZetMvEINzUVzq4YXKVB7Smnlc66Gik79bo7X7kO8jgjp0938FPJ7AE18l+z+pChnwAAAABJRU5E
rkJggg==
)
)+3
B.4
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACoSURBVDhPzZC7DQQhDAVdFwHlkNMJMYWQUsgG
LuUdxl4JpN07ILqRLFmYkT+EB4hoLez/hBRW+HeZM7zsKBGrPS7JFdFn8J232u3/lplNVGrckUdq
3B1bkY4HOw/Y4XzWRfbkBmcPsgMSStBxKGi18U0e96ZSSk+SI7h09fxdZmT/dO0+gXafZOnUJ9MY
7jXvHFpRur93npl+XcmBXDqTBel+LAtrMvABvDKYogJWgwAAAAAASUVORK5CYII=
)
sin(B+
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAkAAAAjCAYAAABGpiBAAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAADGSURBVDhP1ZPZDQQhCIapjJ5oh2YoxVIY5XBw
xj1edpL9E43HF0AB0C/0z5AoAShsBnJzSIg6ptqY1M4aKyKrX7umOyF0SEhhDzVldIsGka2mHBou
IN3iDhpWeqDhwqBYC3NAZuV8Se7H69LgDPydnoZqGnbDIJs/6JfQ/MxIeNcCWUrKZeqERvYjyVcF
5EmmXoD59FoIDoUVEr+5ujWolofL636pgjvk7mcj2HwLOmKslvJwlu2lGQIaqv23fkWBXutRSPUA
qAJK+xdyk2cAAAAASUVORK5CYII=
)
)+3
C.6sin(B+
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAkAAAAjCAYAAABGpiBAAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC2SURBVDhP1ZLREcMgCECZjJ1Yh2UYhVGogFrO
0LQ/7V3fnTmTPAEVsA/4Z0mMAAyagawpCdHQzJTJ4puyIbLl72SnE8KUhAx6SY0xI4ZEMduk5Clg
pcVO8iij0JkipDkX5ilFlOdO1rvvbgXchd/xa6leQzdCiucbviGVQ+zvzntq33z2V/VSUp1CItRJ
lZetMvEINzUVzq4YXKVB7Smnlc66Gik79bo7X7kO8jgjp0938FPJ7AE18l+z+pChnwAAAABJRU5E
rkJggg==
)
)+3
D.6sin(B+
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAkAAAAjCAYAAABGpiBAAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAADGSURBVDhP1ZPZDQQhCIapjJ5oh2YoxVIY5XBw
xj1edpL9E43HF0AB0C/0z5AoAShsBnJzSIg6ptqY1M4aKyKrX7umOyF0SEhhDzVldIsGka2mHBou
IN3iDhpWeqDhwqBYC3NAZuV8Se7H69LgDPydnoZqGnbDIJs/6JfQ/MxIeNcCWUrKZeqERvYjyVcF
5EmmXoD59FoIDoUVEr+5ujWolofL636pgjvk7mcj2HwLOmKslvJwlu2lGQIaqv23fkWBXutRSPUA
qAJK+xdyk2cAAAAASUVORK5CYII=
)
)+3
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