(1)已知a=3√3 ,∠A=30° ,求b
∠B=60°
a/sinA=b/sinB
3√3/(1/2)=b/(√3/2)
6√3=b/(√3/2)
b=6√3*√3/2
b=9
(2)已知C=7,∠B=60°,求a
∠A=30°
a/sinA=c/sinC
a/(1/2)=7
a=7*1/2
a=7...
(1)已知a=3√3 ,∠A=30° ,求b
∠B=60°
a/sinA=b/sinB
3√3/(1/2)=b/(√3/2)
6√3=b/(√3/2)
b=6√3*√3/2
b=9
(2)已知C=7,∠B=60°,求a
∠A=30°
a/sinA=c/sinC
a/(1/2)=7
a=7*1/2
a=7...