如图,四棱锥\(P\)\(-\)\(ABCD\)中,底面\(ABCD\)为矩形,\(PA\)\(⊥\)平面\(ABCD\),\(E\)为\(PD\)的中点.
\((1)\)证明:\(PB\)\(/\!/\)平面\(AEC\);
\((2)\)设\(AP\)\(=1\),\(AD\)\(=\) ,三棱锥\(P\)\(\)\(ABD\)的体积\(V\)\(=\),求\(A\)到平面\(PBC\)的距离.
进入组卷