1、(π/3,1/2)在函数上,所以是切点y'=-sinxx=π/3切线斜率k=y'=-√3/2所以切线是y-1/2=-√3/2*(x-π/3)即√3x+2y-π√3/3+1=0法线垂直切线所以斜率是2√3/3所以法线是y-1/2=2√3/3*(x-π/3)即4√3x-6y-4π√3/3+3=02...