Evaluate the Trigonometric Function Using Its Period as an Aid $\cos \frac { 5 \pi } { 3 }$

question 9

Multiple Choice

Evaluate the trigonometric function using its period as an aid.​ $\cos \frac { 5 \pi } { 3 }$ ​

• A) \(\cos \frac { 5 \pi } { 3 } = \infty\)
• B) \(\cos \frac { 5 \pi } { 3 } = - \frac { 1 } { 2 }\)
• C) \(\cos \frac { 5 \pi } { 3 } = 2\)
• D) \(\cos \frac { 5 \pi } { 3 } = - 2\)
• E) \(\cos \frac { 5 \pi } { 3 } = \frac { 1 } { 2 }\)

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Definitions:

Altruism

The belief in or practice of disinterested and selfless concern for the well-being of others.

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An act performed with no expectation of reward or recognition, often motivated by a desire to help or benefit others.

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A psychological phenomenon that occurs within a group of people, where the desire for harmony or conformity in the group results in an irrational or dysfunctional decision-making outcome.

Dissenting Engineers

Engineers who disagree with the majority opinion within their professional community, often raising ethical, safety, or procedural concerns.