Find the Limit of the Function by Using Direct Substitution $$\lim _ { x \rightarrow \pi / 2 } \left( 4 e ^ { x } \cos x \right)$$

Multiple Choice

Find the limit of the function by using direct substitution.
- $$\lim _ { x \rightarrow \pi / 2 } \left( 4 e ^ { x } \cos x \right)$$

A) 0
B) 1
C) $\frac { \pi } { 2 }$
D) $4 \mathrm { e } ^ { \pi / 2 }$