Question

高中数学必修五正弦定理公式

Answer 1

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//

Answer 2

a/sinA=b/sinB=c/sinC=2R(R是三角形ABC外接圆的半径)

Answer 3

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