MCQ
$\left|x+\frac{1}{x}\right| \geq 2$ then $x \in$
- ✓$\mathrm{R}-\{0\}$
- B$\mathrm{R}-\{\pm 1\}$
- C$\mathrm{R}$
- D$0$
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$f(x) = \sqrt {\left| {{{\sin }^{ - 1}}\left| {\sin x} \right|} \right| - {{\cos }^{ - 1}}\left| {\cos x} \right|} $ is
$(i)$ Maximum value of $z$.
$(ii)$ Minimum value of $z$.
$(iii)$ Maximum value of $z$ has at
$(iv)$ Minimum value of $z$ has at