Find the Numbers at Which F Is Continuous $$f ( x ) = - 3 \cos x$$

Multiple Choice

Find the numbers at which f is continuous. At which numbers is f discontinuous?
- $$f ( x ) = - 3 \cos x$$

A) continuous for all real numbers except $x = - 3$
B) continuous for all real numbers except $x = 0$
C) continuous for all real numbers
D) continuous for all real numbers except $x = 1$