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Functions

Algebra Level 3

If the function $f : \mathbb{R} \rightarrow \mathbb{R} , f(x) = \cos(\dfrac{\pi}{2}[x])$ is an onto function, then the co-domain of this function is:-

\{-1, 0\}

[-1, 1)

[0, 1)

\{ -1, 0, 1\}

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by Ashish Menon

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