Use a Double-Angle Formula to Find the Exact Value of

question 18

Multiple Choice

Use a double-angle formula to find the exact value of when .

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Definitions:

Joint Probability

The likelihood of two events occurring simultaneously.

Independent

Not influenced or controlled by others; in statistics, refers to variables that are not related or do not affect each other.

Marginal Probability

The probability of an event occurring, disregarding all other variables or outcomes in a probability distribution.

E(XY)

The expected value of the product of two random variables X and Y, indicating their joint mean over all pairs of outcomes.