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[" 2.If "y=sin^(-1)((1-x^(2))/(1+x^(2)))...

[" 2.If "y=sin^(-1)((1-x^(2))/(1+x^(2)))" ,then "(dy)/(dx)=],[" a) "(-2)/(1+x^(2))," b) "(2)/(1+x^(2))," co "(1)/(2-x^(2)),(dy)/(2-x^(2))]

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