Which of the Following Is a Solution to the Given $2 \cos x - 1 = 0$

question 13

Multiple Choice

Which of the following is a solution to the given equation?​ $2 \cos x - 1 = 0$ ​

• A) \[x = \frac { 7 \pi } { 4 }\]
• B) \[x = \frac { \pi } { 6 }\]
• C) \(x = \frac { 7 \pi } { 6 }\)
• D) \(x = \frac { 5 \pi } { 3 }\)
• E) \(x = \frac { 3 \pi } { 4 }\)

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Definitions:

Collateral Circulation

An alternate network of blood vessels that can supply blood to an area if the main vessel is blocked or narrowed.

Palpable Superficial Lymph Nodes

Lymph nodes close to the surface of the body that can be felt or palpated, often indicating infection or disease when swollen.

Immature Immune System

A developing immune system that has not yet reached its full capability to fight infections and diseases, common in infants and young children.

Lymph Nodes

Small, bean-shaped structures that are part of the lymphatic system, which filter lymph fluid and help the body fight infection.