Use the Cosine Function to Find the Indicated Part of Triangle

question 60

Multiple Choice

Use the cosine function to find the indicated part of triangle ABC. Round to four significant digits. Find c if A = 25° and b = 21 ft.

• A)19.03 ft
• B)23.17 ft
• C)0.04316 ft
• D)49.69 ft

---

Definitions:

Order

In mathematics, the arrangement or sequence of objects or numbers according to a specific rule, or the degree of a polynomial or differential equation.

Matrix

A rectangular array of numbers, symbols, or expressions, arranged in rows and columns, used in solving systems of linear equations and other mathematical operations.

Solution

The solution or solutions that make an equation, inequality, or system of equations true.

System Of Linear Equations

A collection of two or more linear equations involving the same set of variables.