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Let f(x)={:{(x^(2)+4x",",-3lexle0),(-sin...

Let `f(x)={:{(x^(2)+4x",",-3lexle0),(-sinx",",0ltxle(pi)/(2)),(-cosx-1",",(pi)/(2)ltxlepi):}` then

A

x=-2 is the point of global minima

B

x=`pi` is the point of global maxima

C

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

D

f(x) is dicontinuos at x=0

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A, B, C
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