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The domain of $f(x) = \cos^{-1} \left( \frac{4x + 2[x]}{3} \right)$ (where $[x]$ denotes greatest integer function) is

Updated On: Apr 6, 2026

$\left[ -\frac{1}{4}, \frac{3}{4} \right]$
$\left[ -\frac{3}{4}, \frac{1}{4} \right]$
$\left[ -\frac{3}{4}, -\frac{1}{4} \right]$
$\left[ \frac{1}{4}, \frac{3}{4} \right]$

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The Correct Option is A

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