Use a double-angle formula to find the exact value of cos2u when 
Definitions:
Random Sample
A group selected from a broader population where every individual has the same likelihood of being chosen.
Uniformly Distributed
A type of distribution where all outcomes are equally likely; every variable has the same frequency or probability.
Assembling Product
The process of combining components or parts to build a complete product.
Probability
The measure of the likelihood that an event will occur, expressed as a number between 0 and 1.
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