Find the right and left boundary of the function `f(x) = x cos (1 / x)` at `x = 0`

The function, f(x) = cos^(-1) (cos x) is

The function,f(x)=cos^(-1)(cos x) is

Find the range of the function f(x)=(1)/(1-3 cos x)

Find the domain of the function f(x) = (1)/(sqrt(1 - cos x))

Find the number of critical points of the function f (x) = min (tan x , cos x) , x in (0 , pi)

Find the range of the function f(x)=(1)/(x+2cos x), when x>=0

Evaluate the right hand limit and left hand limit of the function f(x)={(|x-4|/(x-4), x ne 4),(0, x=4):}

Find the range of function f(x)=1+3cos2x

The right hand and left hand limit of the function f(x)={{:((e^(1//x)-1)/(e^(1//x)+1)","," if "xne0),(0","," if "x=0):} are respectively