已知sin(x/2)-cos(x/2)=0求tanx

已知sin(x/2)-cos(x/2)=0求tanx

[sin(x/2)-cos(x/2)]^2=0
1-2sin(x/2)cos(x/2)=0
1-sinx=0
sinx=1 cosx=0
tanx=sinx/cosx=1/0為不存在