Find the Exact Value of the Expression $\cos ^ { - 1 } \left[ \cos \left( - \frac { 3 \pi } { 5 } \right) \right]$

question 47

Multiple Choice

Find the exact value of the expression. Do not use a calculator.
- $\cos ^ { - 1 } \left[ \cos \left( - \frac { 3 \pi } { 5 } \right) \right]$

• A) \(- \frac { 3 \pi } { 5 }\)
• B) \(\frac { 2 \pi } { 5 }\)
• C) \(\frac { 3 \pi } { 5 }\)
• D) \(- \frac { 2 \pi } { 5 }\)

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Definitions:

Schemas

Mental frameworks that organize concepts and information.

Scripts

In cognitive psychology, sequences of expected behaviors, roles, and actions in particular social or personal contexts.

Operations

Internalized actions that allow children to do mentally what before they had done only physically. Operations also are reversible mental actions.

Habits

Regular patterns of behavior that are acquired through frequent repetition and often occur subconsciously.