Solució: \begin{align} ∑ F_(horitzontals) = 0 &= \cssId{Step1}{F_H = T_(AB)·cos φ} \\[3px] ∑ Fverticals = 0 &=\cssId{Step2}{T_(AB) · sin 𝜑 + F_V = T_C + T_D} \\[3px] \end{align}