Find the Exact Value of the Trigonometric Function $\cos \left( \frac { 5 \pi } { 6 } \right)$

question 264

Multiple Choice

Find the exact value of the trigonometric function. Do not use a calculator or tables.
- $\cos \left( \frac { 5 \pi } { 6 } \right)$

• A) \(- \frac { \sqrt { 2 } } { 2 }\)
• B) \(- \frac { 1 } { 2 }\)
• C) \(- \frac { \sqrt { 3 } } { 2 }\)
• D) \(\frac { \sqrt { 3 } } { 2 }\)

---

Definitions:

Physical Elder Abuse

Occurs when someone hits or handles a person roughly, even if there is no injury.

Elder Neglect

Occurs when a person fails to provide an older person with the necessities of life, such as food, clothing, shelter, medical attention, personal care, and required supervision.

Sexual Elder Abuse

Occurs when an older adult is forced to engage in sexual activity; this may include verbal suggestive behaviour, sexual touching, sex without consent, or not respecting a person’s privacy.

Systemic Ageism

Behaviour, policies, or practices that discriminate based on age; can be intentional or unintentional.