Find the Domain and Range of the Function $$f ( x ) = - 9 \cot ^ { 2 } x$$

Find the domain and range of the function.
- $$f ( x ) = - 9 \cot ^ { 2 } x$$

A) Domain: $x \neq \frac { \pi } { 2 } + n \pi$ , for all integers $n$ ; range $[ 0 , \infty )$
B) Domain: $x \neq n \pi$ , for all integers $n$ ; range $( - \infty , 0 ]$
C) Domain: $x \neq n \pi$ , for all integers $n$ ; range $[ 0 , \infty )$
D) Domain: $x \neq \frac { \pi } { 2 } + n \pi$ , for all integers $n$ ; range $( - \infty , \infty )$

Correct Answer:

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