If f (tan x) = cos 2x , x != (2n + 1) pi...

If `f (tan x) = cos 2x , x != (2n + 1) pi/2, n in I` then incorrect statement is

f(x) is an even function

f(x) is an odd function

Range of `f(x) "is" [-1,1]`

Domain of `f(x) "is" x in R`

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