Use a Calculator to Evaluate the Trigonometric Function $$\sec \left( \frac { - 5 \pi } { 8 } \right)$$

question 20

Multiple Choice

Use a calculator to evaluate the trigonometric function. Round your answer to four decimal places. (Be sure the calculator is set to the correct angle mode.)
$$\sec \left( \frac { - 5 \pi } { 8 } \right)$$

• A) \(1.0006\)
• B) \(- 1.0824\)
• C) \(1.2331\)
• D) \(- 2.6131\)
• E) \(0.4142\)

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Definitions:

Degrees Of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution minus the number of parameters estimated.

Significance Level

The probability of rejecting the null hypothesis in a statistical test when it is true, commonly set at 0.05 or 5%.

Chi-Square Value

A statistic that measures the difference between observed and expected frequencies to test for independence in categorical variables.

Null Hypothesis

A hypothesis used in statistical testing that assumes no significant difference or effect exists between certain states or variables.