The function `f(x)=(K tan x+2)/(tan x+1)` is decreasing for all values of `x` then `K =`

The function f(x)=(K tan x+2)/(tanx +1) is decreasing for all values of x then (A) K (B) K>1 (C) K (D) K>2

The function f(x)=tan^(-1)(tan x) is

The function f(x)=tan^(-1)x-x is decreasing on the set

If the function f(x)=(K sin x+2cos x)/(sin x+cos x) is strictly increasing for all values of x, then K 1K 2

The function f(x)=tan^(-1)x-In(1+x^(2)) is increasing for

The function f(x) = tan ^(-1)x -x decreases in the interval

The function f(x) = (|x+2|)/(tan^(-1)(x+2)) , is continuous for

The function f(x)=tan^(-1)x-x decreases in the interval

The function f(x)=tan^(-1)x-x decreases in the interval.

The set of value(s) of k for which f(x)=sin x-cos x-kx is decreasing for all values of x ,is