Find the Domain and Range of the Function $$f ( x ) = - 4 \cos ^ { 2 } x$$

Find the domain and range of the function.
- $$f ( x ) = - 4 \cos ^ { 2 } x$$

A) Domain: $( - \infty , 0 ]$ ; range: $( - \infty , \infty )$
B) Domain: $( - \infty , \infty )$ ; range: $( - \infty , 0 ]$
C) Domain: $[ - 4,0 ]$ ; range: $( - \infty , \infty )$
D) Domain: $( - \infty , \infty )$ ; range: $[ - 4,0 ]$

Correct Answer:

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