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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
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC9SURBVDhPzVTRDcUgCGQydmIdlmEURuEpaIs+
+tKfl2jSxNjrcQdXwV4seIGxQ0FiBGBQPMjqvkCITNpGmczPlA2RLV7HutwJYYCEDGqQGmMwOoh8
tzH1EjDLYgXqLE34KKHcQGMvzEOTs4BNJy58OJ1VjxxLNY58tnT8V/j+4S41sZ5dGy1dk4985RmH
JtUlP0IVKFt7jMoAdQbvUZmnzLSnIsd3xd2Zeu74pqvoeCT1uwX9y/TfbbqPvDA+NfJfs7jA7MgA
AAAASUVORK5CYII=
)
,BC=3,则△ABC的周长为( )
A.4
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC0SURBVDhPzZNNDsAQEIXnXBaOY+8m1g5i6yBd
zFFe/bY0pGpViUTEN+/NA2EwiAhLcwaP9p979HOYLWTNQfvL7IJtDy0tOCFhHYpU/h1mLmAW9PoL
3CbqNeib7Vsx3f0OnEqU4KTNCbz3/HgIbCWoBEhwqjxFdV9BsDcdTd/knEvnjCAIc2Q7U5hh5Sjt
5CCrd3BUaj5Kk1ffswqHovpcuW+ma+4wAiTMHhzrRvUt5WpqFT4BvDKYovKwNAUAAAAASUVORK5C
YII=
)
sin(B+
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAkAAAAjCAYAAABGpiBAAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC9SURBVDhPzVTRDcUgCGQydmIdlmEURuEpaIs+
+tKfl2jSxNjrcQdXwV4seIGxQ0FiBGBQPMjqvkCITNpGmczPlA2RLV7HutwJYYCEDGqQGmMwOoh8
tzH1EjDLYgXqLE34KKHcQGMvzEOTs4BNJy58OJ1VjxxLNY58tnT8V/j+4S41sZ5dGy1dk4985RmH
JtUlP0IVKFt7jMoAdQbvUZmnzLSnIsd3xd2Zeu74pqvoeCT1uwX9y/TfbbqPvDA+NfJfs7jA7MgA
AAAASUVORK5CYII=
)
)+3
B.4
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC0SURBVDhPzZNNDsAQEIXnXBaOY+8m1g5i6yBd
zFFe/bY0pGpViUTEN+/NA2EwiAhLcwaP9p979HOYLWTNQfvL7IJtDy0tOCFhHYpU/h1mLmAW9PoL
3CbqNeib7Vsx3f0OnEqU4KTNCbz3/HgIbCWoBEhwqjxFdV9BsDcdTd/knEvnjCAIc2Q7U5hh5Sjt
5CCrd3BUaj5Kk1ffswqHovpcuW+ma+4wAiTMHhzrRvUt5WpqFT4BvDKYovKwNAUAAAAASUVORK5C
YII=
)
sin(B+
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAkAAAAjCAYAAABGpiBAAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAADPSURBVDhPzVPRDQUhCGMyd2IdlmEUR+EpVA89
83I/l5yJidGGFlvIHix6gLGPgtSYyOiwi1Tvi5TZtB2qsPldFStFLJ5jze6US4CUjc6galKiooPY
T1ulTkGDtpxAvUoTDooqDYSzikCTVyEbnbhwdDpYP2nLyY58t/z4v/C92d38TBieU9A1uSV0Pd6i
4u7D5L0JCA+TuQVwtJ/TEiBUYY0c7bQOyvEIqsj9koI7KOjnIGS6K7TQiItF+Mz2NgzJljx/GAr8
xZveHTLziO4HqAJK+wqxLQsAAAAASUVORK5CYII=
)
)+3
C.6sin(B+
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAkAAAAjCAYAAABGpiBAAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC9SURBVDhPzVTRDcUgCGQydmIdlmEURuEpaIs+
+tKfl2jSxNjrcQdXwV4seIGxQ0FiBGBQPMjqvkCITNpGmczPlA2RLV7HutwJYYCEDGqQGmMwOoh8
tzH1EjDLYgXqLE34KKHcQGMvzEOTs4BNJy58OJ1VjxxLNY58tnT8V/j+4S41sZ5dGy1dk4985RmH
JtUlP0IVKFt7jMoAdQbvUZmnzLSnIsd3xd2Zeu74pqvoeCT1uwX9y/TfbbqPvDA+NfJfs7jA7MgA
AAAASUVORK5CYII=
)
)+3
D.6sin(B+
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAkAAAAjCAYAAABGpiBAAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAADPSURBVDhPzVPRDQUhCGMyd2IdlmEUR+EpVA89
83I/l5yJidGGFlvIHix6gLGPgtSYyOiwi1Tvi5TZtB2qsPldFStFLJ5jze6US4CUjc6galKiooPY
T1ulTkGDtpxAvUoTDooqDYSzikCTVyEbnbhwdDpYP2nLyY58t/z4v/C92d38TBieU9A1uSV0Pd6i
4u7D5L0JCA+TuQVwtJ/TEiBUYY0c7bQOyvEIqsj9koI7KOjnIGS6K7TQiItF+Mz2NgzJljx/GAr8
xZveHTLziO4HqAJK+wqxLQsAAAAASUVORK5CYII=
)
)+3
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