有计算器的帮忙算下1:a/sin45=10/sin30 a=?2:b/sin60=10/sin30 b=?3:a/sin60=20/sin75 a=?4:20/sin60=b/sin45 b=?5:20/sinA=11/sin30 sinA=?A=?两个值都可以取吗?6:39/sinB=54/sin120 sinB=?B=?两个值都可以取吗?

1:a/sin45=10/sin30 a/(√2/2)=10/(1/2)a=(√2/2)*10/(1/2)a=10√2 2:b/sin60=10/sin30 b/(√3/2)=10/(1/2) b/(√3/2)=20b=(√3/2)*20b=10√33:a/sin60=20/sin75a/(√3/2)=10/[(√6+√2)/4]a=(√3/2)*10/[(√6+√2)/...