(A) \( f(\mathrm{x}) \) is continuous at \( \mathrm{x}=-\frac{\pi}{...

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(A) \( f(\mathrm{x}) \) is continuous at \( \mathrm{x}=-\frac{\pi}{2} \)
(B) \( f(\mathrm{x}) \) is not differentiable at \( \mathrm{x}=0 \)
(C) \( f(\mathrm{x}) \) is differentiable at \( \mathrm{x}=1 \)
(D) \( f(\mathrm{x}) \) is differentiable at \( \mathrm{x}=-\frac{3}{2} \)
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