最佳答案:因为关于-π/8对称所以f(-π/4)=f(0)即sin(-π/2)+a cos(-π/2)=sin0+a cos0-1+0=0+aa=-1π=(3.14159
最佳答案:图像关于X=π/6对称,则有φ=-π /6+π/2=π/3y=2sin(8x+π/3)+2=0sin(8x+π/3)=-1,故8x+π/3=2kπ-π /2x=