Answer each of the following questions in 2-3 sentences, drawing exclusively from the provided source material.

1. What is the mathematical definition of a Cosine, and how is a ratio different from a rate?
2. Describe the concept of a "Unit Circle" and the spiritual obligation associated with it.
3. How does the text define "Frequency," and what is its relationship to a "Period"?
4. Explain the dual meaning of an "Orphan" as presented in the source.
5. What is "Wisdom" and what does the spiritual obligation of wisdom call individuals to do?
6. According to the text, what does it mean to "Build," and what is the spiritual context of this action?
7. Define "Computational Complexity" and identify the two primary resources it measures.
8. What is a "Greedy Algorithm," and what spiritual lesson does this approach hold?
9. Describe a "Linked List," including the two components each item within it contains.
10. Explain the strategy for finding an "Optimal Stopping Point" when faced with multiple options.