What Is the Cosine of 45°

question 1

Multiple Choice

What is the cosine of 45°?

• A)0.7
• B)0.71
• C)0.707
• D)0.7071
• E)0.70710

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Definitions:

Level of Significance

The threshold used in statistical tests for rejecting the null hypothesis, often denoted by alpha (α), representing the probability of making a Type I error.

Gender

A range of characteristics pertaining to, and differentiating between, masculinity and femininity, often based on social, cultural, and psychological aspects.

Chi-Square Distribution

A statistical distribution used in hypothesis testing that is based on the sum of squares of standardized random variables.

Degrees of Freedom

A concept in statistical calculations used to adjust for the number of variables, indicating the amount of independent information available to estimate another parameter.