The range of $f(x)=4 \sin ^{-1}\left(\frac{x^{2}}{x^{2}+1}\right)$ is - DASH

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Question

The range of $f(x)=4 \sin ^{-1}\left(\frac{x^{2}}{x^{2}+1}\right)$ is

$[0,2 \pi]$

$[0,2 \pi)$

$[0, \pi)$

$[0, \pi]$

Solution

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