If \[y={{\cos }^{-1}}\cos (|x|-f(x)),\] where \[\] \[f(x)\left\{ \begin{align} & =1\,,\,\text{if}\,\,\,x>0 \\ & =-1\,,\,\text{if}\,\,\,x

If \[y={{\cos }^{-1}}\cos (|x|-f(x)),\] where \[\

1.	If \[y={{\cos }^{-1}}\cos (\|x\|-f(x)),\] where \[\] \[f(x)\left\{ \begin{align} & =1\,,\,\text{if}\,\,\,x>0 \\ & =-1\,,\,\text{if}\,\,\,x
A.	? 1
B.	1
C.	0
D.	Indeterminate
Answer» C. 0

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If \[y={{\cos }^{-1}}\cos (|x|-f(x)),\] where \[\] \[f(x)\left\{ \begin{align} & =1\,,\,\text{if}\,\,\,x>0 \\ & =-1\,,\,\text{if}\,\,\,x

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