Suppose ABC Is a Right Triangle with Sides of Lengths $\cos \mathrm { A }$

question 20

Multiple Choice

Suppose ABC is a right triangle with sides of lengths a, b, and c and right angle at C. Find the unknown side length
using the Pythagorean theorem and then find the value of the indicated trigonometric function of the given angle.
Rationalize the denominator if applicable.
-Find $\cos \mathrm { A }$ when $\mathrm { a } = 3$ and $\mathrm { b } = 8$ .

• A) \(\frac { \sqrt { 73 } } { 3 }\)
• B) \(\frac { 8 \sqrt { 73 } } { 73 }\)
• C) \(\frac { \sqrt { 73 } } { 8 }\)
• D) \(\frac { 3 \sqrt { 73 } } { 73 }\)

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Definitions:

Long-Term Hypoxia

A prolonged state of inadequate oxygen supply to the body or a region of the body, which can cause tissue damage and other health issues.

Capillary Refill

A quick test to assess blood circulation where pressure is applied to a nail or skin to see how fast color returns, indicating capillary efficiency.

Immediate Memory

The capacity to hold a small amount of information in mind in an active, readily available state for a short period.

Adduction

The movement of a body part toward the central axis of the body.