\textbf{Statements}
(13) As $x \rightarrow - \infty$ the function $\cos \left( e ^ { x } \right)$ tends to a finite limit.\\
(14) As $x \rightarrow \infty$ the function $\cos \left( e ^ { x } \right)$ changes sign infinitely many times.\\
(15) As $x \rightarrow \infty$, the function $\sin ( \ln ( x ) )$ tends to a finite limit.\\
(16) $\sin ( \ln ( x ) )$ changes sign only finitely many times as $x$ goes towards 0 from 1.