If f(x)=sin[pi^2]x+sin[-pi^2]x, where [x...

If `f(x)=sin[pi^2]x+sin[-pi^2]x`, where `[x]` denotes the greatest integer less than or equal to
A. `f(pi//2)=1`
B. `f(pi)=2`
C. `f(pi//4)=-1`
D. none of these

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