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The domain of the function f(x)=1/(sqrt(...

The domain of the function `f(x)=1/(sqrt({sinx}+{sin(pi+x)}))` where `{dot}` denotes the fractional part, is (a)`[0,pi]` (b) `(2n+1)pi/2, n in Z` (c)`(0,pi)` (d) none of these

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