defence exam Army Havildar SAC Mock Test Series 2025 Mathematics Relations and Functions Range of a Function
Possible Range of f (x) = \(\rm \frac{1}{1-2\cos x}\) in the options given is
1
\(\left[\frac{1}{3},1\right] \)
2
\(\left[-1,\frac{1}{3}\right] \)
3
(– ∞, –1] ∪ \(\left[\frac{1}{3},\infty\right) \)
4
\(\left[-\frac{1}{3},1\right] \)