=sinA+sin(A+π/3)=(1+1/2)sinA+√3/2cosA=3/2sinA+√3/2cosA=√3(√3/2sinA+1/2cosA)=√3(sinAcosπ/6+cosAsinπ/6)=√3sin(A+π/6)
sin(A+π/3)=1/2sinA+√3/2cosA.
题干是怎样的
