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[" 72.If "sin^(-1)x+sin^(-1)y+sin^(-1)z=...

[" 72.If "sin^(-1)x+sin^(-1)y+sin^(-1)z=pi" ,then the value of "],[x sqrt(1-x^(2))+y sqrt(1-y^(2))+z sqrt(1-z^(2))" will be "],[[" (a) "2xyz," (b) "xyz," (c) "(1)/(2)xyz," (d) "(1)/(3)xyz]]

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