Find the Limit $\lim _ { x \rightarrow \infty } \sin x$

Short Answer

Find the limit.(a) $\lim _ { x \rightarrow \infty } \sin x$ (b) $\lim _ { x \rightarrow \infty } e ^ { - x }$ (c) $\lim _ { t \rightarrow \infty } \frac { t ^ { 3 } + 3 t } { 1 - t ^ { 4 } }$