由sina^2+cosa^2=1可知,(k+1/k-3)^2+(k-1/k-3)^2=1 则可知k=1或-7
又终边不落在坐标轴上,则sina≠0且cosa≠0,即k+1/k-3≠0且k-1/k-3≠0,即k≠1
综上所述,K=-7
给分哦~答案是 3/4