Let f(x) =sin ({x})/(a) + cos ({x})/(a) ...

Let f(x) =sin `({x})/(a) + cos ({x})/(a)` where `a gt 0` and {.} denotes the fractional part function . Then find the set of values of 'a' for which f can attain its maximum values.

A

`(0,4/pi)`

B

`(4/pi,oo)`

C

`(0,oo)`

D

R

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The correct Answer is:

A

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