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If y=|cosx|+|sinx|, then (dy)/(dx)" at "...

If `y=|cosx|+|sinx|`, then `(dy)/(dx)" at "x=(2pi)/(3)` is

A

0

B

1

C

`(1-sqrt3)/2`

D

`(sqrt3-1)/2`

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The correct Answer is:
D
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