Use the Fact That the Trigonometric Functions Are Periodic to Find

question 352

Multiple Choice

Use the fact that the trigonometric functions are periodic to find the exact value of the expression. Do not use a calculator.
- $\cos \frac { 16 \pi } { 3 }$

• A) \(- \frac { \sqrt { 3 } } { 2 }\)
• B) \(\frac { \sqrt { 3 } } { 2 }\)
• C) \(\frac { 1 } { 2 }\)
• D) \(- \frac { 1 } { 2 }\)

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Definitions:

Wilcoxon Rank Sum Test

A non-parametric statistical hypothesis test used to compare two independent samples, based on the ranks of their combined observations.

Standard Deviation

A tool to evaluate the distribution's breadth or heterogeneity of a set of data.

Wilcoxon Rank Sum Test

A non-parametric statistical test used to compare two independent samples to determine if they come from the same distribution.

Null Hypothesis

A default hypothesis that there is no significant difference or effect, often represented as H0 in statistical tests, to be tested against an alternative hypothesis.