正弦定理公式:
a/sinA=b/sinB=c/sinC=2R
a=2RsinA,b=2RsinB,c=2RsinC
参考http://58.130.5.100//
a/sinA=b/sinB=c/sinC=2R(R是三角形ABC外接圆的半径)
正弦定理:a/sinA=b/sinB=c/sinC
变形:1,a/c=sinA/sinC a/b=sinA/sinC b/c=sinB/sinA
2,a/b/c=sinA/sinB/sinC
3,a=2R*sinA b=2R*sinB c=2R*sinC
4,sinA=a/2R sinB=b/2R sinC=c/2R
5,A<B=a<b=2R*sinA<2R*sinB=sinA<sinB