A) \[f\left( x \right)\]is continuous and differentiable at x = 0.
B) \[f\left( x \right)\]is discontinuous at x = 0
C) \[f\left( x \right)\]is discontinuous at x = 0 but not differentiable.
D) \[f\left( x \right)\] is differentiable but not continuous at \[x=\pi /2\].
Correct Answer: B
Solution :
\[f\left( x \right)\]is discontinuous at x = 0
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