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

question 86

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 $a = 9$ and $b = 7$

• A) \(\frac { \sqrt { 130 } } { 7 }\)
• B) \(\frac { \sqrt { 130 } } { 9 }\)
• C) \(\frac { 7 \sqrt { 130 } } { 130 }\)
• D) \(\frac { 9 \sqrt { 130 } } { 130 }\)

---

Definitions:

Predator Distraction Hypothesis

A theory explaining certain animal behaviors or characteristics as tactics to divert a predator's attention away from the most vulnerable members of a group.

Gull Behavior

The various actions and responses characteristic of gulls, including feeding strategies, social structure, and migration patterns.

Foraging

The act of searching for and exploiting food resources by animals.

Dry-park Check

A diagnostic procedure used to identify issues in a vehicle's steering mechanism by observing movement while the vehicle is stationary.