JEE Math Practice Question
The range of $$f(x)=4 \sin ^{-1}\left(\frac{x^{2}}{x^{2}+1}\right)$$ is
- A.$$[0,2 \pi]$$
- B.$$[0,2 \pi)$$
- C.$$[0, \pi)$$
- D.$$[0, \pi]$$
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