Find the Zeros of the Function in the Interval $[-2 \pi, 2 \pi]$

question 46

Multiple Choice

Find the zeros of the function in the interval $[-2 \pi, 2 \pi]$ .
- $$f ( x ) = 3 \cos x$$

• A) \(\pm \frac { \pi } { 2 } , \pm \pi , \pm \frac { 3 \pi } { 2 } , \pm 2 \pi\)
• B) \(0 , \pm \frac { \pi } { 2 } , \pm \frac { 3 \pi } { 2 }\)
• C) \(\pm \frac { \pi } { 2 } , \pm \frac { 3 \pi } { 2 }\)
• D) \(0 , \pm \pi , \pm 2 \pi\)

---

Definitions:

Chi-Square Distribution

The Chi-Square Distribution is a statistical distribution used for hypothesis testing and is derived from the sum of the squares of a set of normally distributed random variables.

Degrees of Freedom

The number of values in the final calculation of a statistic that are free to vary.

Qualitative Variables

Variables that express qualitative attributes and differentiate by category, not in numerical terms.

Chi-Square Test

A nonparametric test used to determine if there is a significant association between two categorical variables.