a/sinA=b/sinB=c/sinCA=180°-B-C=105°a/sinA=b/sinBb=asinB/sinA =(8+8√3)*(√2/2)/(√6+√2)/4 =(4√2+4√6)*4/(√6+√2)=16
16，正弦定理ac/sinB=ab/sinC
