1.

Find dy/dx of y=cos^-1frac(1-x^2)((1+x^2)),0

Answer»

SOLUTION :`y=cos^-1((1-x^2)/(1+x^2))=2tan^-1xtherefore(DY)/(DX)=2XX1/(1+x^2)=2/(1+x^2)cos^-1((1-x^2)/(1+x^2))=2tan^-1x`


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