1、∠B=90°-30°=60°
c=b/cos30°=5÷根号3/2=10根号3/3
a=c×sin30°=5根号3/3
2、∠B=90°-14°=76°
a=c×sinA=1200sin14°=.(用计算器算)
b=c×cosA=1200cos14°=.(用计算器算)
1、∠B=90°-30°=60°
c=b/cos30°=5÷根号3/2=10根号3/3
a=c×sin30°=5根号3/3
2、∠B=90°-14°=76°
a=c×sinA=1200sin14°=.(用计算器算)
b=c×cosA=1200cos14°=.(用计算器算)