$f(x)=3 \cos |x|$ এর সীমা কত?

$-1 \leq f(x) \leq 1$

$-3 \leq f(x) \leq 3$

$0 \leq f(x) \leq 3$

$0 \leq \mathrm{f}(\mathrm{x}) \leq 1$