f(x)=2sin(2x+π/6)+1
f(A)=2
f(A)=2sin(2A+π/6)+1=2
得 sin(2A+π/6)=1/2
2A+π/6=5π/6
A=π/3
S=1/2 bcsinA=√3 /2
得 c=2
a²=b²+c²-2bccosA=1+4-2=3
a=√3
a/sinA=√3/(√3/2)=2
选择 B
f(x)=2sin(2x+π/6)+1
f(A)=2
f(A)=2sin(2A+π/6)+1=2
得 sin(2A+π/6)=1/2
2A+π/6=5π/6
A=π/3
S=1/2 bcsinA=√3 /2
得 c=2
a²=b²+c²-2bccosA=1+4-2=3
a=√3
a/sinA=√3/(√3/2)=2
选择 B