Question

The domain of $f(x)=\cot \frac{x}{3}$ is

• A. $(-\infty ,\infty )$
• B. R - $\{n\pi :n\in Z\}$
• C. R - $\{3n\pi :n\in Z\}$
• D. $(0,\infty )$

Answer 1

Answer: (C)

Domain of $\cot x=R\{n\pi ,n\in Z\}$