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For the function f(x) = sin (pi[x]) xx c...

For the function `f(x) = sin (pi[x]) xx cos^(-1)([x])`, choose the correct option.
(where [.] represents the greatest integer function)

A

Domain of `f(x)` in [-1,1]

B

Range of `f(x)` contains exactly two elements

C

`f(x)` is an identify function

D

`f(x)` is a constant function

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The correct Answer is:
D
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