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Let f(x)= cos ((pi)/(x)), x ne 0 then as...

Let `f(x)= cos ((pi)/(x)), x ne 0` then assuming k as in integer

A

f(x) increases in the interval `((1)/(2k +1), (1)/(2k))`

B

f(x) decreases in the interval `((1)/(2k+1), (1)/(2k))`

C

f(x) decreases in the interval `((1)/(2k+2), (1)/(2k+1))`

D

f(x) increases in the interval `((1)/(2k+2),(1)/(2k+1))`

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