Domain of the function $f(x) = \sqrt {2 - {{\sec }^{ - 1}}x} $ is
Domain of the function $f(x) = \sqrt {2 - {{\sec }^{ - 1}}x} $ is
- A
$\left( { - \infty , - 1} \right] \cup \left[ {1,\infty } \right)$
- B
$\left( { - \infty , - 1} \right] \cup \left[ {\sec 1,\infty } \right)$
- C
$\left( { - \infty ,\sec 2} \right] \cup \left[ {1,\infty } \right)$
- D
$\left( { - \infty ,\sec 2} \right] \cup \left[ {\sec 1,\infty } \right)$
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