Let f(x) = \cos(\pi/{x}), x ≠ 0 then assuming k as an integer

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

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

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

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

WBJEE 2018 Math Solved Paper

Question : 69 of 75

Marks: +1, -0

Let f(x) = cos(

), x ≠ 0 then assuming k as an integer

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