If f(x)=sinx-cosx, the function decreasi...

If `f(x)=sinx-cosx`, the function decreasing in `0 le x le 2pi` is

A

`[(5pi)/6,(3pi)/4]`

B

`[pi/4,pi/2]`

C

`[(3pi)/2,(5pi)/2]`

D

None of these

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The correct Answer is:

D

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