Use an Identity to Write the Expression as a Single $2 \cos ^ { 2 } 22.5 ^ { \circ } - 1$

question 62

Multiple Choice

Use an identity to write the expression as a single trigonometric function or as a single number.
- $2 \cos ^ { 2 } 22.5 ^ { \circ } - 1$

• A) \(\sqrt { 3 }\)
• B) \(\frac { \sqrt { 2 } } { 4 }\)
• C) \(\frac { \sqrt { 3 } } { 3 }\)
• D) \(\frac { \sqrt { 2 } } { 2 }\)

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Definitions:

Pricing

The strategy and methodology of determining the selling price of a product or service, taking into account factors like cost, demand, and competition.

Packaging

entails the process and materials used to enclose or protect products for distribution, storage, sale, and use, often playing a key role in marketing.

Production Costs

The total expenses incurred in manufacturing a product or providing a service, including materials, labor, and overhead.

Prospect Theory

A behavioral economic theory that describes how people make decisions based on perceived gains or losses rather than final outcomes, focusing on how individuals assess risk in the face of uncertainty.