已知曲线\(C\):\(\begin{cases} & x=2\cos \alpha \\ & y=\sqrt{3}\sin \alpha \end{cases}\)\((α\)为参数\()\)和定点\(A(0,\)\(\sqrt{3}\)\()\),\(F\)\({\,\!}_{1}\)、\(F\)\({\,\!}_{2}\)是此曲线的左、右焦点,以原点\(O\)为极点,以\(x\)轴的正半轴为极轴建立极坐标系.
\((1)\)求直线\(AF_{2}\)的极坐标方程;
\((2)\)经过点\(F_{1}\)且与直线\(AF_{2}\)垂直的直线交此圆锥曲线于\(M\)、\(N\)两点,求\(||MF_{1}|-|NF_{1}||\)的值.