Determine Whether the Function Is Periodic $$f ( x ) = 8 \cos ( 2 x + 1 ) - \sin ( 3 x - 1 )$$

Multiple Choice

Determine whether the function is periodic. If it is periodic, find the period.
- $$f ( x ) = 8 \cos ( 2 x + 1 ) - \sin ( 3 x - 1 )$$

A) $2 \pi$
B) Not periodic
C) $\pi$
D) $4 \pi$