MCQ
If x is a real number and |x| < 5, then:
- A$\text{x}\geq5$
- B$-5<\text{x}<5$
- C$\text{x}\leq-5$
- D$-5\leq\text{x}\leq5$
Solution:
If x is a real number.
|x| < 5
⇒ -5 < x < 5
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Range of $\text{f(x)}=\frac{1}{1-2\cos\text{x}}$ is.
$\Big[\frac{1}{3}, 1\Big]$
$\Big[-1, \frac{1}{3}\Big]$
$(-\infty, -1]\cup\Big[\frac{1}{3},\infty\Big)$
$\Big[-\frac{1}{3}, 1\Big]$
Number of solutions of the equation $\tan\text{x}+\sec\text{x}=2\cos\text{x}$ lying in the interval $[0,2\pi]$ is: