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If sin^(-1)x+sin^(-1)y+sin^(-1)z=pi,t h ...

If `sin^(-1)x+sin^(-1)y+sin^(-1)z=pi,t h e nx^4+y^2+z^4+4x^2y^2z^2=K(x^2y^2+y^2z^2+z^2x^2),` where `K` is equal to 1 (b) 2 (c) 4 (d) none of these

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