Inverse of the tangent of an angle.

\(\tan{(\textit{θ})} = \dfrac{y}{x}\)

\(\cot{(\textit{θ})} = \dfrac{1}{\textrm{tan}\space{(\textit{θ})}} = \dfrac{x}{y}\)

The cotangent of angle

*x*is noted as “cot(*x*)” and is read as “cotangent of angle*x*“.