The number of elements in the range of the function: \( y=\sin ^{-1}\left[x^{2}+\frac{5}{9}\righ...

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The number of elements in the range of the function: \( y=\sin ^{-1}\left[x^{2}+\frac{5}{9}\right]+\cos ^{-1}\left[x^{2}-\frac{4}{9}\right] \) where [.] denotes the greatest integer function is
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