Differentiate the following w.r.t. $x : \log\;( cos \: e^x ) $

Question

$\begin{array}{1 1} - e^x\; \tan{e^x} \\ e^x\; \tan{e^x} \\ e^x\; \tan{e^{-x}} \\ -e^x\; \tan{e^{-x}} \end{array} $