The range of $f(x) = [\cos x + \sin x]$ is (Where $[.]$ is $G.I.F.$)
The range of $f(x) = [\cos x + \sin x]$ is (Where $[.]$ is $G.I.F.$)
- A
$[-\sqrt 2 ,\sqrt 2 ]$
- B
$\{0, 1, 2\}$
- C
$\{-1, 0, 1\}$
- D
$\{-2. -1, 0, 1\}$
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- [JEE MAIN 2021]