Question

The domain of $f(x)=Si{n}^{-1}x+Cose{c}^{-1}x$ is

• A. [-1,1]
• B. (-1,1)
• C. {-1,1}
• D. $(-\infty ,\infty )$

Answer 1

Answer: (C)

$\left[-1.1\right]\cap \left\{\left(-\infty ,-1\right]\cup \left[1,\infty \right)\right\}$