y=sin x/2 +(√3)cos x/2
=2sin(1/2*sinx/2+cos x/2*√3/2)
=2sin(sinx/2*cosπ/3+cos x/2*sinπ/3)
=2sin(x/2+π/3)
令x/2+π/3=kπ+π/2,则x=2kπ+π/3
令k=0,x=π/3就是一条对称轴 .(它的对称轴有无数多条.)
y=sin x/2 +(√3)cos x/2
=2sin(1/2*sinx/2+cos x/2*√3/2)
=2sin(sinx/2*cosπ/3+cos x/2*sinπ/3)
=2sin(x/2+π/3)
令x/2+π/3=kπ+π/2,则x=2kπ+π/3
令k=0,x=π/3就是一条对称轴 .(它的对称轴有无数多条.)