Find the Exact Value of the Expression $$\cos ^ { - 1 } \left[ \cos \left( \frac { \pi } { 10 } \right) \right]$$

question 266

Multiple Choice

Find the exact value of the expression. Do not use a calculator.
- $$\cos ^ { - 1 } \left[ \cos \left( \frac { \pi } { 10 } \right) \right]$$

• A) \(\frac { \pi } { 10 }\)
• B) \(10 \pi\)
• C) \(- 10 \pi\)
• D) \(- \frac { \pi } { 10 }\)

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Definitions:

Collective Behaviour

The actions, thoughts, and feelings of a relatively spontaneous and unstructured group of people in response to similar stimuli or conditions.

Social Modelling

The process of learning behaviors, attitudes, or emotional reactions through observing and imitating others.

Lemming Effect

Refers to a phenomenon where individuals in a group follow each other's actions blindly, often disregarding their own interests or the potential dangers.

Allport's Conditions

Criteria identified by psychologist Gordon Allport that facilitate positive contact between groups, including equal status, common goals, and institutional support.