Question 899194
Let (_) to be y.
{{{cos x=(cot x)y}}}
{{{cos x/cot x=y}}}
{{{cos x/(cos x/sin x)=y}}}
{{{cos x*(sin x/cos x)=y}}}
{{{cross(cos x)*(sin x/cross((cos x)))=y}}}
{{{sin x=y}}}
{{{y=sin x}}}
Therefore, the answer to be filled in (_) is sin x.