Let S={t in R: f(x)=|x-pi|(e^(|x|)-1)sin...

Let `S={t in R: f(x)=|x-pi|(e^(|x|)-1)sin|x|` is not differentiable at t} Then the set S is equal to: (1) `phi` (2) {0} (3) `{pi}` (4) `{0,pi}`

A

{0}

B

`{pi}`

C

`{0,pi}`

D

`O/(an empty set)`

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The correct Answer is:

D

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