If f(x)=cos|x|+[|sinx2|], (where [.] denotes the greatest integer function), then f(x) is
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Explanation:
f(x)=cos|x| +[|sinx/2|]
0<+[|sinx/2|]<1/2 => +[|sinx//2|]=0
Therefore, f(x)=cos|x| = cosx Ax € R
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