Use Addition or Subtraction Formulas to Find the Exact Value $\cos 105 ^ { \circ }$

question 93

Essay

Use addition or subtraction formulas to find the exact value of $\cos 105 ^ { \circ }$ .

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Definitions:

Innovation Sparcity

The lack or infrequent occurrence of creative or novel ideas, methods, or products in a specific area or domain.

Organizational Cultural Lag

The phenomenon where an organization's culture takes time to catch up with technological innovations, leading to a gap between current practices and potential efficiencies.

Creativity-Relevant Processes

Cognitive and behavioral processes that facilitate creative thinking, including problem-solving, risk-taking, and drawing connections between ideas.

Creativity

The ability to generate or recognize ideas, alternatives, or possibilities that may be useful in solving problems, communicating with others, and entertaining ourselves and others.