If \( x, y, z \in[-1,1] \) such that \( \sin ^{-1} x+\sin ^{-1} y+\...

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If \( x, y, z \in[-1,1] \) such that \( \sin ^{-1} x+\sin ^{-1} y+\sin ^{-1} z \)
\( \mathrm{P} \)
\( =\frac{-3 \pi}{2} \) the value of \( x^{2}+y^{2}+z^{2} \) is equal to
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(1) 3
(2) 1
(3) 0
(4) 2
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