The ranges of the functions `2/(2+3cosx)`

Find the range of the function (1)/(2cosx-1) .

The range of the function x/(2 + x^2) is

Show that range of the function (1)/(2cosx-1)" is "(-oo,-(1)/(3)]cup[1,oo)

The range of the function f(x)=cos^(2)x -5 cosx -9 is :

Range of functions Part-2

The range of the function f(x) =[sinx+cosx] (where [x] denotes the greatest integer function) is f(x) in :

The range of the function f(x) =[sinx+cosx] (where [x] denotes the greatest integer function) is f(x) in :

The range of the function y=x^(-2//3) is