已知双曲线\(C： \dfrac {x^{2}}{a^{2}}- \dfrac {y^{2}}{b^{2}}=1(a > 0,b > 0)\)的左、右焦点分别为\(F_{1}\)、\(F_{2}\)，过\(F_{2}\)作平行于\(C\)的渐近线的直线交\(C\)于点\(P\)，若\(PF_{1}⊥PF_{2}\)，则\(C\)的渐近线方程为\((\)　　\()\)