5.
\((1)\)已知\(\alpha\)是第二象限角,化简\(\sqrt{\dfrac{1{+}\sin\alpha}{1{-}\sin\alpha}}{-}\sqrt{\dfrac{1{-}\sin\alpha}{1{+}\sin\alpha}}\)的结果是______ .
\((2)\)已知函数\(f(x){=}a^{x{+}1}{+}1(a{ > }0{,}a{\neq }1)\),则它的图象恒过定点的坐标为______ .
\((3)\)已知\(A({-}3{,}2){,}\overrightarrow{{AB}}{=}(6{,}0)\),则线段\(AB\)中点的坐标是______ .
\((4)\)如图,在正方形\(ABCD\)中,\(E\)为\(BC\)边中点,若\(\overrightarrow{{AE}}{=}\lambda\overrightarrow{{AB}}{+}\mu\overrightarrow{{AD}}\),则\(\lambda{+}\mu{=}\) ______ .