"If "f(x)={{:(,-x-(pi)/(2),x le -(pi)/(2...

`"If "f(x)={{:(,-x-(pi)/(2),x le -(pi)/(2)),(,-cos x,-(pi)/(2) lt x le 0),(,x-1,0 lt x le 1),(,"In "x,x gt 1):}` then which one of the following is not correct?

A

f(x) is continuous at `x=-pi//2`

B

f(x) is not differentiable at x=0

C

f(x) is differtiable at x=1

D

f(x) is differentiable at x=-3/2

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The correct Answer is:

A, B, C, D

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