已知sin(x/2)-cos(x/2)=0求tanx
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已知sin(x/2)-cos(x/2)=0求tanx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=
已知sin(x/2)-cos(x/2)=0求tanx
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为不存在