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STATEMENT -1 : The function f : [-1,1] t...

STATEMENT -1 : The function `f : [-1,1] to [0,pi],f(x)=cos^(-1)x` is not one-one. and STATEMENT -2 :The function `f : (-oo,oo)to[-1,1],f(x)=cosx is not one-one.

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