y=3sin（x-θ）按({x-->x-π/3;y-->y-3)后得：F:y=3sin(x-π/3-θ)+3若F的一条对称轴式直线x=π/4的处理是：y(π/4)=6或=0即：|sin(-π/12-θ|=1所以(-π/12-θ=π/2+kπθ=-7π/12-kπ所以θ的集合是：｛θ|θ=-7π...