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

question 42

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 $\mathrm { a } = \sqrt { 7 }$ and $\mathrm { c } = 6$ .

• A) \(\frac { 7 } { 6 }\)
• B) \(\frac { 29 } { 7 }\)
• C) \(\frac { \sqrt { 29 } } { 6 }\)
• D) \(\frac { \sqrt { 7 } } { 6 }\)

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Definitions:

Variable Costs

Expenses that change in proportion to the activity of a business, such as costs for raw materials or production.

Fixed Costs

Costs that remain constant in total regardless of changes in the volume of activity within certain limits of capacity.

Curvilinear

Pertaining to or representing by a curve or curves; often applied in economics and statistics to describe non-linear relationships.

Variable Costs

Costs that change in proportion to the amount of goods produced or the volume of sales.