Find the Exact Value of the Given Expression Using a Sum

question 83

Multiple Choice

Find the exact value of the given expression using a sum or difference formula. $\cos \frac { 13 \pi } { 12 }$

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

---

Definitions:

DNA Virus

A virus that has its genetic material encoded in DNA, as opposed to an RNA virus.

Non-Enveloped

Describes viruses that lack an outer lipid membrane, which often influences their method of infection and transmission.

Evolution

The developmental process in which varied organisms are assumed to have originated and expanded from initial forms throughout Earth's chronological past.

Beak Size

A morphological trait in birds and some other animals, influencing their feeding habits and ecological niche, often subject to evolutionary adaptation.