tan(0) x/14 ?

$${\frac{\underset{\,\,\,\,^{\textcolor[rgb]{0.66,0.66,0.66}{360^\circ}}}{{tan}}{\left({\mathtt{0}}^\circ\right)}{\mathtt{\,\times\,}}{\mathtt{x}}}{{\mathtt{14}}}} = {\frac{{\mathtt{0}}{\mathtt{\,\times\,}}\left(\underset{{\tiny{\text{Error: Unknown Identifier}}}}{{\mathtt{x}}}\right)}{{\mathtt{14}}}}$$