7.
\((1)\)双曲线\(\dfrac{{{x}^{2}}}{{{a}^{2}}}-\dfrac{{{y}^{2}}}{{{b}^{2}}}=1(a > 0,b > 0)\)的离心率为\(\sqrt{3}\),则其渐近线方程为________________;
\((2)\)在正方体\(ABCD-{{A}_{1}}{{B}_{1}}{{C}_{1}}{{D}_{1}}\)中,点\(E\),\(F\)分别是底面\({{A}_{1}}{{B}_{1}}{{C}_{1}}{{D}_{1}}\)和侧面\(C{{C}_{1}}{{D}_{1}}D\)的中心,若\(\overrightarrow{EF}+\lambda \overrightarrow{{{A}_{1}}D}=\overrightarrow{0}(\lambda \in R)\),则\(\lambda =\)_________;
\((3)\) 已知\(|AB|=4\),点\(P\)在\(A\)、\(B\)所在的平面内运动且保持\(|PA|+|PB|=6\),则\(|PA|\)的最大值和最小值分别是_____和______;
\((4)\)已知双曲线\(\dfrac{{{x}^{2}}}{{{a}^{2}}}-\dfrac{{{y}^{2}}}{{{b}^{2}}}=1(a > 0,b > 0)\)的左、右焦点分别为\({{F}_{1}}(-c,0)\),\({{F}_{2}}(c,0).\)若双曲线上存在点\(P\)使得\(\dfrac{\sin \angle P{{F}_{1}}{{F}_{2}}}{\sin \angle P{{F}_{2}}{{F}_{1}}}=\dfrac{a}{c}\),则该双曲线的离心率\(e\)的取值范围是_______________.